Collection: Springs - Extension

Springs -> Extension
OD (D0) Overall Length (L0) Wire Diameter (d) Max. Extension (L1) Spring Rate Initial Tension (IT) Indicative
Image
OD (D0)
38.10
mm

(Equiv. 1.5 in.)
Overall Length (L0)
914.0
mm

(Equiv. 35.984 in.)
Wire Diameter (d)
4.12
mm

(Equiv. 0.162 in.)
Spring Rate
12.05
N/mm
Initial Tension (IT)
12.0
N
Extension Springs - 38.1x914x4.12 mm - Steel - None
Material: Steel - None   
Category: Springs - Extension - Stainless Steel
Part Number: ES-3810-9140-41-S2
Extension Springs - 38.1x914x4.12 mm Stainless Steel - Steel - None Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Sep 18, 2025
Regular price $180.77 AUD
Regular price $216.93 AUD Sale price $180.77 AUD
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OD (D0) Overall Length (L0) Wire Diameter (d) Max. Extension (L1) Indicative
Image
OD (D0)
38.10
mm

(Equiv. 1.5 in.)
Overall Length (L0)
914.0
mm

(Equiv. 35.984 in.)
Wire Diameter (d)
4.12
mm

(Equiv. 0.162 in.)
Extension Springs - 38.1x914x4.12 mm - Steel - None
Material: Steel - None    Spring Rate: 12.05 N/mm    Initial Tension (IT): 12.0 N   
Category: Springs - Extension - Stainless Steel
Part Number: ES-3810-9140-41-S2
Extension Springs - 38.1x914x4.12 mm Stainless Steel - Steel - None Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Sep 18, 2025
Regular price $180.77 AUD
Regular price $216.93 AUD Sale price $180.77 AUD
Each
Quantity Required

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OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
127.0
mm

(Equiv. 5 in.)
Wire Diameter (d)
4.01
mm

(Equiv. 0.158 in.)
Max. Extension (L1)
226.060
mm
Spring Rate
3.696
N/mm
Initial Tension (IT)
25.8
N
Extension Springs - 44.45x127x4.01 mm - Steel
Material: Steel    Load at L1: 392.040 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1270-40-M
Extension Springs - 44.45x127x4.01 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $71.86 AUD
Regular price $150.05 AUD Sale price $71.86 AUD
Each
Quantity Required

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OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
127.0
mm

(Equiv. 5 in.)
Wire Diameter (d)
4.01
mm

(Equiv. 0.158 in.)
Max. Extension (L1)
226.060
mm
Extension Springs - 44.45x127x4.01 mm - Steel
Material: Steel    Spring Rate: 3.696 N/mm    Initial Tension (IT): 25.8 N    Load at L1: 392.040 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1270-40-M
Extension Springs - 44.45x127x4.01 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $71.86 AUD
Regular price $150.05 AUD Sale price $71.86 AUD
Each
Quantity Required

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OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
127.0
mm

(Equiv. 5 in.)
Wire Diameter (d)
4.50
mm

(Equiv. 0.177 in.)
Max. Extension (L1)
193.550
mm
Spring Rate
6.410
N/mm
Initial Tension (IT)
42.3
N
Extension Springs - 44.45x127x4.5 mm - Steel
Material: Steel    Load at L1: 469.330 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1270-45-M
Extension Springs - 44.45x127x4.5 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $85.05 AUD
Regular price $177.91 AUD Sale price $85.05 AUD
Each
Quantity Required

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OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
127.0
mm

(Equiv. 5 in.)
Wire Diameter (d)
4.50
mm

(Equiv. 0.177 in.)
Max. Extension (L1)
193.550
mm
Extension Springs - 44.45x127x4.5 mm - Steel
Material: Steel    Spring Rate: 6.410 N/mm    Initial Tension (IT): 42.3 N    Load at L1: 469.330 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1270-45-M
Extension Springs - 44.45x127x4.5 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $85.05 AUD
Regular price $177.91 AUD Sale price $85.05 AUD
Each
Quantity Required

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OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
127.0
mm

(Equiv. 5 in.)
Wire Diameter (d)
5.00
mm

(Equiv. 0.197 in.)
Max. Extension (L1)
173.740
mm
Spring Rate
10.757
N/mm
Initial Tension (IT)
64.9
N
Extension Springs - 44.45x127x5 mm - Steel
Material: Steel    Load at L1: 564.040 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1270-50-M
Extension Springs - 44.45x127x5 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $100.23 AUD
Regular price $210.10 AUD Sale price $100.23 AUD
Each
Quantity Required

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OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
127.0
mm

(Equiv. 5 in.)
Wire Diameter (d)
5.00
mm

(Equiv. 0.197 in.)
Max. Extension (L1)
173.740
mm
Extension Springs - 44.45x127x5 mm - Steel
Material: Steel    Spring Rate: 10.757 N/mm    Initial Tension (IT): 64.9 N    Load at L1: 564.040 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1270-50-M
Extension Springs - 44.45x127x5 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $100.23 AUD
Regular price $210.10 AUD Sale price $100.23 AUD
Each
Quantity Required

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OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
139.7
mm

(Equiv. 5.5 in.)
Wire Diameter (d)
4.01
mm

(Equiv. 0.158 in.)
Max. Extension (L1)
268.730
mm
Spring Rate
2.838
N/mm
Initial Tension (IT)
25.8
N
Extension Springs - 44.45x139.7x4.01 mm - Steel
Material: Steel    Load at L1: 392.040 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1397-40-M
Extension Springs - 44.45x139.7x4.01 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $77.50 AUD
Regular price $161.96 AUD Sale price $77.50 AUD
Each
Quantity Required

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OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
139.7
mm

(Equiv. 5.5 in.)
Wire Diameter (d)
4.01
mm

(Equiv. 0.158 in.)
Max. Extension (L1)
268.730
mm
Extension Springs - 44.45x139.7x4.01 mm - Steel
Material: Steel    Spring Rate: 2.838 N/mm    Initial Tension (IT): 25.8 N    Load at L1: 392.040 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1397-40-M
Extension Springs - 44.45x139.7x4.01 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $77.50 AUD
Regular price $161.96 AUD Sale price $77.50 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
139.7
mm

(Equiv. 5.5 in.)
Wire Diameter (d)
4.50
mm

(Equiv. 0.177 in.)
Max. Extension (L1)
225.300
mm
Spring Rate
4.990
N/mm
Initial Tension (IT)
42.3
N
Extension Springs - 44.45x139.7x4.5 mm - Steel
Material: Steel    Load at L1: 469.330 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1397-45-M
Extension Springs - 44.45x139.7x4.5 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $91.32 AUD
Regular price $191.30 AUD Sale price $91.32 AUD
Each
Quantity Required

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OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
139.7
mm

(Equiv. 5.5 in.)
Wire Diameter (d)
4.50
mm

(Equiv. 0.177 in.)
Max. Extension (L1)
225.300
mm
Extension Springs - 44.45x139.7x4.5 mm - Steel
Material: Steel    Spring Rate: 4.990 N/mm    Initial Tension (IT): 42.3 N    Load at L1: 469.330 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1397-45-M
Extension Springs - 44.45x139.7x4.5 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $91.32 AUD
Regular price $191.30 AUD Sale price $91.32 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
139.7
mm

(Equiv. 5.5 in.)
Wire Diameter (d)
5.00
mm

(Equiv. 0.197 in.)
Max. Extension (L1)
199.140
mm
Spring Rate
8.462
N/mm
Initial Tension (IT)
64.9
N
Extension Springs - 44.45x139.7x5 mm - Steel
Material: Steel    Load at L1: 564.040 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1397-50-M
Extension Springs - 44.45x139.7x5 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $108.68 AUD
Regular price $228.06 AUD Sale price $108.68 AUD
Each
Quantity Required

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OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
139.7
mm

(Equiv. 5.5 in.)
Wire Diameter (d)
5.00
mm

(Equiv. 0.197 in.)
Max. Extension (L1)
199.140
mm
Extension Springs - 44.45x139.7x5 mm - Steel
Material: Steel    Spring Rate: 8.462 N/mm    Initial Tension (IT): 64.9 N    Load at L1: 564.040 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1397-50-M
Extension Springs - 44.45x139.7x5 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $108.68 AUD
Regular price $228.06 AUD Sale price $108.68 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
152.4
mm

(Equiv. 6 in.)
Wire Diameter (d)
4.01
mm

(Equiv. 0.158 in.)
Max. Extension (L1)
311.400
mm
Spring Rate
2.312
N/mm
Initial Tension (IT)
25.8
N
Extension Springs - 44.45x152.4x4.01 mm - Steel
Material: Steel    Load at L1: 392.040 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1524-40-M
Extension Springs - 44.45x152.4x4.01 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $82.59 AUD
Regular price $172.73 AUD Sale price $82.59 AUD
Each
Quantity Required

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OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
152.4
mm

(Equiv. 6 in.)
Wire Diameter (d)
4.01
mm

(Equiv. 0.158 in.)
Max. Extension (L1)
311.400
mm
Extension Springs - 44.45x152.4x4.01 mm - Steel
Material: Steel    Spring Rate: 2.312 N/mm    Initial Tension (IT): 25.8 N    Load at L1: 392.040 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1524-40-M
Extension Springs - 44.45x152.4x4.01 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $82.59 AUD
Regular price $172.73 AUD Sale price $82.59 AUD
Each
Quantity Required

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OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
152.4
mm

(Equiv. 6 in.)
Wire Diameter (d)
4.50
mm

(Equiv. 0.177 in.)
Max. Extension (L1)
257.050
mm
Spring Rate
4.080
N/mm
Initial Tension (IT)
42.3
N
Extension Springs - 44.45x152.4x4.5 mm - Steel
Material: Steel    Load at L1: 469.330 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1524-45-M
Extension Springs - 44.45x152.4x4.5 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $98.68 AUD
Regular price $206.75 AUD Sale price $98.68 AUD
Each
Quantity Required

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OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
152.4
mm

(Equiv. 6 in.)
Wire Diameter (d)
4.50
mm

(Equiv. 0.177 in.)
Max. Extension (L1)
257.050
mm
Extension Springs - 44.45x152.4x4.5 mm - Steel
Material: Steel    Spring Rate: 4.080 N/mm    Initial Tension (IT): 42.3 N    Load at L1: 469.330 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1524-45-M
Extension Springs - 44.45x152.4x4.5 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $98.68 AUD
Regular price $206.75 AUD Sale price $98.68 AUD
Each
Quantity Required

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OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
152.4
mm

(Equiv. 6 in.)
Wire Diameter (d)
5.00
mm

(Equiv. 0.197 in.)
Max. Extension (L1)
224.280
mm
Spring Rate
6.973
N/mm
Initial Tension (IT)
64.9
N
Extension Springs - 44.45x152.4x5 mm - Steel
Material: Steel    Load at L1: 564.040 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1524-50-M
Extension Springs - 44.45x152.4x5 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $117.50 AUD
Regular price $246.60 AUD Sale price $117.50 AUD
Each
Quantity Required

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OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
152.4
mm

(Equiv. 6 in.)
Wire Diameter (d)
5.00
mm

(Equiv. 0.197 in.)
Max. Extension (L1)
224.280
mm
Extension Springs - 44.45x152.4x5 mm - Steel
Material: Steel    Spring Rate: 6.973 N/mm    Initial Tension (IT): 64.9 N    Load at L1: 564.040 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1524-50-M
Extension Springs - 44.45x152.4x5 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $117.50 AUD
Regular price $246.60 AUD Sale price $117.50 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
165.1
mm

(Equiv. 6.5 in.)
Wire Diameter (d)
4.01
mm

(Equiv. 0.158 in.)
Max. Extension (L1)
353.820
mm
Spring Rate
1.962
N/mm
Initial Tension (IT)
25.8
N
Extension Springs - 44.45x165.1x4.01 mm - Steel
Material: Steel    Load at L1: 392.040 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1651-40-M
Extension Springs - 44.45x165.1x4.01 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $87.86 AUD
Regular price $183.85 AUD Sale price $87.86 AUD
Each
Quantity Required

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OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
165.1
mm

(Equiv. 6.5 in.)
Wire Diameter (d)
4.01
mm

(Equiv. 0.158 in.)
Max. Extension (L1)
353.820
mm
Extension Springs - 44.45x165.1x4.01 mm - Steel
Material: Steel    Spring Rate: 1.962 N/mm    Initial Tension (IT): 25.8 N    Load at L1: 392.040 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1651-40-M
Extension Springs - 44.45x165.1x4.01 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $87.86 AUD
Regular price $183.85 AUD Sale price $87.86 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
165.1
mm

(Equiv. 6.5 in.)
Wire Diameter (d)
5.00
mm

(Equiv. 0.197 in.)
Max. Extension (L1)
249.680
mm
Spring Rate
5.939
N/mm
Initial Tension (IT)
64.9
N
Extension Springs - 44.45x165.1x5 mm - Steel
Material: Steel    Load at L1: 564.040 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1651-50-M
Extension Springs - 44.45x165.1x5 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $125.23 AUD
Regular price $263.12 AUD Sale price $125.23 AUD
Each
Quantity Required

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OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
165.1
mm

(Equiv. 6.5 in.)
Wire Diameter (d)
5.00
mm

(Equiv. 0.197 in.)
Max. Extension (L1)
249.680
mm
Extension Springs - 44.45x165.1x5 mm - Steel
Material: Steel    Spring Rate: 5.939 N/mm    Initial Tension (IT): 64.9 N    Load at L1: 564.040 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1651-50-M
Extension Springs - 44.45x165.1x5 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $125.23 AUD
Regular price $263.12 AUD Sale price $125.23 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
165.1
mm

(Equiv. 6.5 in.)
Wire Diameter (d)
4.50
mm

(Equiv. 0.177 in.)
Max. Extension (L1)
288.800
mm
Spring Rate
3.450
N/mm
Initial Tension (IT)
42.3
N
Extension Springs - 44.45x165.1x4.5 mm - Steel
Material: Steel    Load at L1: 469.330 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1651-45-M
Extension Springs - 44.45x165.1x4.5 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $105.59 AUD
Regular price $221.40 AUD Sale price $105.59 AUD
Each
Quantity Required

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OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
165.1
mm

(Equiv. 6.5 in.)
Wire Diameter (d)
4.50
mm

(Equiv. 0.177 in.)
Max. Extension (L1)
288.800
mm
Extension Springs - 44.45x165.1x4.5 mm - Steel
Material: Steel    Spring Rate: 3.450 N/mm    Initial Tension (IT): 42.3 N    Load at L1: 469.330 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1651-45-M
Extension Springs - 44.45x165.1x4.5 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $105.59 AUD
Regular price $221.40 AUD Sale price $105.59 AUD
Each
Quantity Required

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OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
177.8
mm

(Equiv. 7 in.)
Wire Diameter (d)
4.01
mm

(Equiv. 0.158 in.)
Max. Extension (L1)
396.490
mm
Spring Rate
1.648
N/mm
Initial Tension (IT)
25.8
N
Extension Springs - 44.45x177.8x4.01 mm - Steel
Material: Steel    Load at L1: 392.040 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1778-40-M
Extension Springs - 44.45x177.8x4.01 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $93.05 AUD
Regular price $194.83 AUD Sale price $93.05 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
177.8
mm

(Equiv. 7 in.)
Wire Diameter (d)
4.01
mm

(Equiv. 0.158 in.)
Max. Extension (L1)
396.490
mm
Extension Springs - 44.45x177.8x4.01 mm - Steel
Material: Steel    Spring Rate: 1.648 N/mm    Initial Tension (IT): 25.8 N    Load at L1: 392.040 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1778-40-M
Extension Springs - 44.45x177.8x4.01 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $93.05 AUD
Regular price $194.83 AUD Sale price $93.05 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
177.8
mm

(Equiv. 7 in.)
Wire Diameter (d)
5.00
mm

(Equiv. 0.197 in.)
Max. Extension (L1)
274.830
mm
Spring Rate
5.168
N/mm
Initial Tension (IT)
64.9
N
Extension Springs - 44.45x177.8x5 mm - Steel
Material: Steel    Load at L1: 564.040 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1778-50-M
Extension Springs - 44.45x177.8x5 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $134.50 AUD
Regular price $282.71 AUD Sale price $134.50 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
177.8
mm

(Equiv. 7 in.)
Wire Diameter (d)
5.00
mm

(Equiv. 0.197 in.)
Max. Extension (L1)
274.830
mm
Extension Springs - 44.45x177.8x5 mm - Steel
Material: Steel    Spring Rate: 5.168 N/mm    Initial Tension (IT): 64.9 N    Load at L1: 564.040 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1778-50-M
Extension Springs - 44.45x177.8x5 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $134.50 AUD
Regular price $282.71 AUD Sale price $134.50 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
177.8
mm

(Equiv. 7 in.)
Wire Diameter (d)
4.50
mm

(Equiv. 0.177 in.)
Max. Extension (L1)
320.290
mm
Spring Rate
2.990
N/mm
Initial Tension (IT)
42.3
N
Extension Springs - 44.45x177.8x4.5 mm - Steel
Material: Steel    Load at L1: 469.330 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1778-45-M
Extension Springs - 44.45x177.8x4.5 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $112.32 AUD
Regular price $235.62 AUD Sale price $112.32 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
177.8
mm

(Equiv. 7 in.)
Wire Diameter (d)
4.50
mm

(Equiv. 0.177 in.)
Max. Extension (L1)
320.290
mm
Extension Springs - 44.45x177.8x4.5 mm - Steel
Material: Steel    Spring Rate: 2.990 N/mm    Initial Tension (IT): 42.3 N    Load at L1: 469.330 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1778-45-M
Extension Springs - 44.45x177.8x4.5 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $112.32 AUD
Regular price $235.62 AUD Sale price $112.32 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
190.5
mm

(Equiv. 7.5 in.)
Wire Diameter (d)
4.50
mm

(Equiv. 0.177 in.)
Max. Extension (L1)
352.040
mm
Spring Rate
2.640
N/mm
Initial Tension (IT)
42.3
N
Extension Springs - 44.45x190.5x4.5 mm - Steel
Material: Steel    Load at L1: 469.330 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1905-45-M
Extension Springs - 44.45x190.5x4.5 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $119.86 AUD
Regular price $251.64 AUD Sale price $119.86 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
190.5
mm

(Equiv. 7.5 in.)
Wire Diameter (d)
4.50
mm

(Equiv. 0.177 in.)
Max. Extension (L1)
352.040
mm
Extension Springs - 44.45x190.5x4.5 mm - Steel
Material: Steel    Spring Rate: 2.640 N/mm    Initial Tension (IT): 42.3 N    Load at L1: 469.330 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1905-45-M
Extension Springs - 44.45x190.5x4.5 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $119.86 AUD
Regular price $251.64 AUD Sale price $119.86 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
190.5
mm

(Equiv. 7.5 in.)
Wire Diameter (d)
4.01
mm

(Equiv. 0.158 in.)
Max. Extension (L1)
439.170
mm
Spring Rate
1.488
N/mm
Initial Tension (IT)
25.8
N
Extension Springs - 44.45x190.5x4.01 mm - Steel
Material: Steel    Load at L1: 392.040 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1905-40-M
Extension Springs - 44.45x190.5x4.01 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $98.86 AUD
Regular price $207.18 AUD Sale price $98.86 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
190.5
mm

(Equiv. 7.5 in.)
Wire Diameter (d)
4.01
mm

(Equiv. 0.158 in.)
Max. Extension (L1)
439.170
mm
Extension Springs - 44.45x190.5x4.01 mm - Steel
Material: Steel    Spring Rate: 1.488 N/mm    Initial Tension (IT): 25.8 N    Load at L1: 392.040 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1905-40-M
Extension Springs - 44.45x190.5x4.01 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $98.86 AUD
Regular price $207.18 AUD Sale price $98.86 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
203.2
mm

(Equiv. 8 in.)
Wire Diameter (d)
4.01
mm

(Equiv. 0.158 in.)
Max. Extension (L1)
481.840
mm
Spring Rate
1.312
N/mm
Initial Tension (IT)
25.8
N
Extension Springs - 44.45x203.2x4.01 mm - Steel
Material: Steel    Load at L1: 392.040 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-2032-40-M
Extension Springs - 44.45x203.2x4.01 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $106.59 AUD
Regular price $223.49 AUD Sale price $106.59 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
203.2
mm

(Equiv. 8 in.)
Wire Diameter (d)
4.01
mm

(Equiv. 0.158 in.)
Max. Extension (L1)
481.840
mm
Extension Springs - 44.45x203.2x4.01 mm - Steel
Material: Steel    Spring Rate: 1.312 N/mm    Initial Tension (IT): 25.8 N    Load at L1: 392.040 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-2032-40-M
Extension Springs - 44.45x203.2x4.01 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $106.59 AUD
Regular price $223.49 AUD Sale price $106.59 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
190.5
mm

(Equiv. 7.5 in.)
Wire Diameter (d)
5.00
mm

(Equiv. 0.197 in.)
Max. Extension (L1)
300.230
mm
Spring Rate
4.555
N/mm
Initial Tension (IT)
64.9
N
Extension Springs - 44.45x190.5x5 mm - Steel
Material: Steel    Load at L1: 564.040 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1905-50-M
Extension Springs - 44.45x190.5x5 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $143.86 AUD
Regular price $302.47 AUD Sale price $143.86 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
190.5
mm

(Equiv. 7.5 in.)
Wire Diameter (d)
5.00
mm

(Equiv. 0.197 in.)
Max. Extension (L1)
300.230
mm
Extension Springs - 44.45x190.5x5 mm - Steel
Material: Steel    Spring Rate: 4.555 N/mm    Initial Tension (IT): 64.9 N    Load at L1: 564.040 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-1905-50-M
Extension Springs - 44.45x190.5x5 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $143.86 AUD
Regular price $302.47 AUD Sale price $143.86 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
203.2
mm

(Equiv. 8 in.)
Wire Diameter (d)
4.50
mm

(Equiv. 0.177 in.)
Max. Extension (L1)
383.790
mm
Spring Rate
2.360
N/mm
Initial Tension (IT)
42.3
N
Extension Springs - 44.45x203.2x4.5 mm - Steel
Material: Steel    Load at L1: 469.330 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-2032-45-M
Extension Springs - 44.45x203.2x4.5 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $126.59 AUD
Regular price $265.86 AUD Sale price $126.59 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
203.2
mm

(Equiv. 8 in.)
Wire Diameter (d)
4.50
mm

(Equiv. 0.177 in.)
Max. Extension (L1)
383.790
mm
Extension Springs - 44.45x203.2x4.5 mm - Steel
Material: Steel    Spring Rate: 2.360 N/mm    Initial Tension (IT): 42.3 N    Load at L1: 469.330 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-2032-45-M
Extension Springs - 44.45x203.2x4.5 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $126.59 AUD
Regular price $265.86 AUD Sale price $126.59 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
228.6
mm

(Equiv. 9 in.)
Wire Diameter (d)
4.01
mm

(Equiv. 0.158 in.)
Max. Extension (L1)
567.180
mm
Spring Rate
0.840
N/mm
Initial Tension (IT)
25.8
N
Extension Springs - 44.45x228.6x4.01 mm - Steel
Material: Steel    Load at L1: 392.040 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-2286-40-M
Extension Springs - 44.45x228.6x4.01 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $117.05 AUD
Regular price $245.77 AUD Sale price $117.05 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
228.6
mm

(Equiv. 9 in.)
Wire Diameter (d)
4.01
mm

(Equiv. 0.158 in.)
Max. Extension (L1)
567.180
mm
Extension Springs - 44.45x228.6x4.01 mm - Steel
Material: Steel    Spring Rate: 0.840 N/mm    Initial Tension (IT): 25.8 N    Load at L1: 392.040 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-2286-40-M
Extension Springs - 44.45x228.6x4.01 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $117.05 AUD
Regular price $245.77 AUD Sale price $117.05 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
203.2
mm

(Equiv. 8 in.)
Wire Diameter (d)
5.00
mm

(Equiv. 0.197 in.)
Max. Extension (L1)
325.630
mm
Spring Rate
4.081
N/mm
Initial Tension (IT)
64.9
N
Extension Springs - 44.45x203.2x5 mm - Steel
Material: Steel    Load at L1: 564.040 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-2032-50-M
Extension Springs - 44.45x203.2x5 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $148.05 AUD
Regular price $311.36 AUD Sale price $148.05 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
203.2
mm

(Equiv. 8 in.)
Wire Diameter (d)
5.00
mm

(Equiv. 0.197 in.)
Max. Extension (L1)
325.630
mm
Extension Springs - 44.45x203.2x5 mm - Steel
Material: Steel    Spring Rate: 4.081 N/mm    Initial Tension (IT): 64.9 N    Load at L1: 564.040 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-2032-50-M
Extension Springs - 44.45x203.2x5 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $148.05 AUD
Regular price $311.36 AUD Sale price $148.05 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
228.6
mm

(Equiv. 9 in.)
Wire Diameter (d)
4.50
mm

(Equiv. 0.177 in.)
Max. Extension (L1)
447.290
mm
Spring Rate
1.961
N/mm
Initial Tension (IT)
42.3
N
Extension Springs - 44.45x228.6x4.5 mm - Steel
Material: Steel    Load at L1: 469.330 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-2286-45-M
Extension Springs - 44.45x228.6x4.5 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $143.14 AUD
Regular price $300.89 AUD Sale price $143.14 AUD
Each
Quantity Required

Backorder: Out of Stock.
OD (D0)
44.45
mm

(Equiv. 1.75 in.)
Overall Length (L0)
228.6
mm

(Equiv. 9 in.)
Wire Diameter (d)
4.50
mm

(Equiv. 0.177 in.)
Max. Extension (L1)
447.290
mm
Extension Springs - 44.45x228.6x4.5 mm - Steel
Material: Steel    Spring Rate: 1.961 N/mm    Initial Tension (IT): 42.3 N    Load at L1: 469.330 N   
Category: Springs - Extension - Music Wire
Part Number: ES-4445-2286-45-M
Extension Springs - 44.45x228.6x4.5 mm Music Wire - Steel Spring
Out of Stock | Backorder Now | Orders can be expected around Thu, Oct 23, 2025
Regular price $143.14 AUD
Regular price $300.89 AUD Sale price $143.14 AUD
Each
Quantity Required

Backorder: Out of Stock.