Thread Repair - Size Kits - Keylocking

Thread Repair -> Size Kits -> Keylocking

There are 13 products in the sub-categories of Thread Repair - Size Kits - Keylocking. Browse the Thread Repair - Size Kits - Keylocking products table.

Category Details

A selection of Keylocking Size Kits Thread Repair. Keylocking inserts are used to repair threads by tapping the worn thread to a standard larger thread, twisting the insert into place and then driving in the keys to lock the insert. Also known as keenserts.

  • Each kit contains an installation tool and the quantity of inserts shown. One size per kit.
  • Also known as keenserts, keylocking inserts are available in mild steel and stainless steel.
  • Installation is by drilling out the old thread, countersinking, tapping new thread with a standard tap, screwing the insert until slightly below the surface, then tapping down the keys using the tool supplied and a hammer.

Miniature Bearings Australia - MBA Minibearings

Additional resources:


A more concise listing may be found in the Thread Repair - Size Kits - Keylocking category on the Small Parts & Bearings online store.
Internal Thread External Thread Length Inserts Per Kit Indicative
Image
Internal Thread
8-32 UNC (4.17mm)

External Thread
5/16-18 UNC (7.94mm)

Length
7.9
mm

(Equiv. 0.311 in.)
Inserts Per Kit
9
Size Kits Thread Repair - 8-32 UNC -4.17mm- 5/16-18 UNC -7.94mm- 7.9 mm - Steel
Material: Steel   
Part Number: KLI-0417-KIT
Size Kits Thread Repair - 8-32 UNC - 4.17mm - 5/16-18 UNC - 7.94mm - 7.9 mm Keylocking - Steel Insert
Out of Stock | Backorder Now | Orders can be expected around Fri, Nov 07, 2025
$118.23 AUD
$141.87 AUD $118.23 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Internal Thread External Thread Length Inserts Per Kit Indicative
Image
Internal Thread
8-32 UNC (4.17mm)

External Thread
5/16-18 UNC (7.94mm)

Length
7.9
mm

(Equiv. 0.311 in.)
Inserts Per Kit
9
Size Kits Thread Repair - 8-32 UNC -4.17mm- 5/16-18 UNC -7.94mm- 7.9 mm - Steel
Material: Steel   
Part Number: KLI-0417-KIT
Size Kits Thread Repair - 8-32 UNC - 4.17mm - 5/16-18 UNC - 7.94mm - 7.9 mm Keylocking - Steel Insert
Out of Stock | Backorder Now | Orders can be expected around Fri, Nov 07, 2025
$118.23 AUD
$141.87 AUD $118.23 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Internal Thread
10-32 UNF (4.76mm)

External Thread
3/8-16

Length
7.9
mm

(Equiv. 0.311 in.)
Inserts Per Kit
9
Size Kits Thread Repair - 10-32 UNF -4.76mm- 3/8-16 7.9 mm - Steel
Material: Steel   
Part Number: KLI-0476-KIT
Size Kits Thread Repair - 10-32 UNF - 4.76mm - 3/8-16 7.9 mm Keylocking - Steel Insert
Out of Stock | Backorder Now | Orders can be expected around Fri, Nov 07, 2025
$99.59 AUD
$119.51 AUD $99.59 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Internal Thread
10-32 UNF (4.76mm)

External Thread
3/8-16

Length
7.9
mm

(Equiv. 0.311 in.)
Inserts Per Kit
9
Size Kits Thread Repair - 10-32 UNF -4.76mm- 3/8-16 7.9 mm - Steel
Material: Steel   
Part Number: KLI-0476-KIT
Size Kits Thread Repair - 10-32 UNF - 4.76mm - 3/8-16 7.9 mm Keylocking - Steel Insert
Out of Stock | Backorder Now | Orders can be expected around Fri, Nov 07, 2025
$99.59 AUD
$119.51 AUD $99.59 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Internal Thread
1/4-20 UNC (6.35mm)

External Thread
7/16-14 UNC (11.11mm)

Length
9.4
mm

(Equiv. 0.37 in.)
Inserts Per Kit
8
Size Kits Thread Repair - 1/4-20 UNC -6.35mm- 7/16-14 UNC -11.11mm- 9.4 mm - Steel
Material: Steel   
Deleted Item. Available while stocks last.
Part Number: KLI-0635-KIT
Size Kits Thread Repair - 1/4-20 UNC - 6.35mm - 7/16-14 UNC - 11.11mm - 9.4 mm Keylocking - Steel Insert
1 Available Now | Item Discontinued - Up to 1 may be ordered online. No backorders. Please contact us if you need a larger quantity
$37.69 AUD
$90.14 AUD $37.69 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

1 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Internal Thread
1/4-20 UNC (6.35mm)

External Thread
7/16-14 UNC (11.11mm)

Length
9.4
mm

(Equiv. 0.37 in.)
Inserts Per Kit
8
Size Kits Thread Repair - 1/4-20 UNC -6.35mm- 7/16-14 UNC -11.11mm- 9.4 mm - Steel
Material: Steel   
Deleted Item. Available while stocks last.
Part Number: KLI-0635-KIT
Size Kits Thread Repair - 1/4-20 UNC - 6.35mm - 7/16-14 UNC - 11.11mm - 9.4 mm Keylocking - Steel Insert
1 Available Now | Item Discontinued - Up to 1 may be ordered online. No backorders. Please contact us if you need a larger quantity
$37.69 AUD
$90.14 AUD $37.69 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

1 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Internal Thread
1/4-20 UNC (6.35mm)

External Thread
7/16-14 UNC (11.11mm)

Length
9.4
mm

(Equiv. 0.37 in.)
Inserts Per Kit
8
Size Kits Thread Repair - 1/4-20 UNC -6.35mm- 7/16-14 UNC -11.11mm- 9.4 mm - Stainless Steel
Material: Stainless Steel   
Part Number: KLI-0635-KIT-SS
Size Kits Thread Repair - 1/4-20 UNC - 6.35mm - 7/16-14 UNC - 11.11mm - 9.4 mm Keylocking - Stainless Steel Insert
Out of Stock | Backorder Now | Orders can be expected around Fri, Nov 07, 2025
$103.68 AUD
$124.42 AUD $103.68 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Internal Thread
1/4-20 UNC (6.35mm)

External Thread
7/16-14 UNC (11.11mm)

Length
9.4
mm

(Equiv. 0.37 in.)
Inserts Per Kit
8
Size Kits Thread Repair - 1/4-20 UNC -6.35mm- 7/16-14 UNC -11.11mm- 9.4 mm - Stainless Steel
Material: Stainless Steel   
Part Number: KLI-0635-KIT-SS
Size Kits Thread Repair - 1/4-20 UNC - 6.35mm - 7/16-14 UNC - 11.11mm - 9.4 mm Keylocking - Stainless Steel Insert
Out of Stock | Backorder Now | Orders can be expected around Fri, Nov 07, 2025
$103.68 AUD
$124.42 AUD $103.68 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Internal Thread
5/16-18 UNC (7.94mm)

External Thread
1/2-13 UNC (12.7mm)

Length
10.9
mm

(Equiv. 0.429 in.)
Inserts Per Kit
7
Size Kits Thread Repair - 5/16-18 UNC -7.94mm- 1/2-13 UNC -12.7mm- 10.9 mm - Stainless Steel
Material: Stainless Steel   
Part Number: KLI-0794-KIT-SS
Size Kits Thread Repair - 5/16-18 UNC - 7.94mm - 1/2-13 UNC - 12.7mm - 10.9 mm Keylocking - Stainless Steel Insert
Out of Stock | Backorder Now | Orders can be expected around Fri, Nov 07, 2025
$133.95 AUD
$160.75 AUD $133.95 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Internal Thread
5/16-18 UNC (7.94mm)

External Thread
1/2-13 UNC (12.7mm)

Length
10.9
mm

(Equiv. 0.429 in.)
Inserts Per Kit
7
Size Kits Thread Repair - 5/16-18 UNC -7.94mm- 1/2-13 UNC -12.7mm- 10.9 mm - Stainless Steel
Material: Stainless Steel   
Part Number: KLI-0794-KIT-SS
Size Kits Thread Repair - 5/16-18 UNC - 7.94mm - 1/2-13 UNC - 12.7mm - 10.9 mm Keylocking - Stainless Steel Insert
Out of Stock | Backorder Now | Orders can be expected around Fri, Nov 07, 2025
$133.95 AUD
$160.75 AUD $133.95 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Internal Thread
5/16-18 UNC (7.94mm)

External Thread
1/2-13 UNC (12.7mm)

Length
10.9
mm

(Equiv. 0.429 in.)
Inserts Per Kit
7
Size Kits Thread Repair - 5/16-18 UNC -7.94mm- 1/2-13 UNC -12.7mm- 10.9 mm - Steel
Material: Steel   
Deleted Item. Available while stocks last.
Part Number: KLI-0794-KIT
Size Kits Thread Repair - 5/16-18 UNC - 7.94mm - 1/2-13 UNC - 12.7mm - 10.9 mm Keylocking - Steel Insert
1 Available Now | Item Discontinued - Up to 1 may be ordered online. No backorders. Please contact us if you need a larger quantity
$37.61 AUD
$90.12 AUD $37.61 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

1 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Internal Thread
5/16-18 UNC (7.94mm)

External Thread
1/2-13 UNC (12.7mm)

Length
10.9
mm

(Equiv. 0.429 in.)
Inserts Per Kit
7
Size Kits Thread Repair - 5/16-18 UNC -7.94mm- 1/2-13 UNC -12.7mm- 10.9 mm - Steel
Material: Steel   
Deleted Item. Available while stocks last.
Part Number: KLI-0794-KIT
Size Kits Thread Repair - 5/16-18 UNC - 7.94mm - 1/2-13 UNC - 12.7mm - 10.9 mm Keylocking - Steel Insert
1 Available Now | Item Discontinued - Up to 1 may be ordered online. No backorders. Please contact us if you need a larger quantity
$37.61 AUD
$90.12 AUD $37.61 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

1 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Internal Thread
5/16-24 UNF (7.94mm)

External Thread
1/2-13 UNC (12.7mm)

Length
10.9
mm

(Equiv. 0.429 in.)
Inserts Per Kit
7
Size Kits Thread Repair - 5/16-24 UNF -7.94mm- 1/2-13 UNC -12.7mm- 10.9 mm - Steel
Material: Steel   
Deleted Item. Available while stocks last.
Part Number: KLI-0794F-KIT
Size Kits Thread Repair - 5/16-24 UNF - 7.94mm - 1/2-13 UNC - 12.7mm - 10.9 mm Keylocking - Steel Insert
1 Available Now | Item Discontinued - Up to 1 may be ordered online. No backorders. Please contact us if you need a larger quantity
$39.56 AUD
$94.90 AUD $39.56 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

1 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Internal Thread
5/16-24 UNF (7.94mm)

External Thread
1/2-13 UNC (12.7mm)

Length
10.9
mm

(Equiv. 0.429 in.)
Inserts Per Kit
7
Size Kits Thread Repair - 5/16-24 UNF -7.94mm- 1/2-13 UNC -12.7mm- 10.9 mm - Steel
Material: Steel   
Deleted Item. Available while stocks last.
Part Number: KLI-0794F-KIT
Size Kits Thread Repair - 5/16-24 UNF - 7.94mm - 1/2-13 UNC - 12.7mm - 10.9 mm Keylocking - Steel Insert
1 Available Now | Item Discontinued - Up to 1 may be ordered online. No backorders. Please contact us if you need a larger quantity
$39.56 AUD
$94.90 AUD $39.56 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

1 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Internal Thread
3/8-16 UNC (9.53mm)

External Thread
9/16-12 UNC

Length
12.7
mm

(Equiv. 0.5 in.)
Inserts Per Kit
6
Size Kits Thread Repair - 3/8-16 UNC -9.53mm- 9/16-12 UNC 12.7 mm - Stainless Steel
Material: Stainless Steel   
Part Number: KLI-0953-KIT-SS
Size Kits Thread Repair - 3/8-16 UNC - 9.53mm - 9/16-12 UNC 12.7 mm Keylocking - Stainless Steel Insert
Out of Stock | Backorder Now | Orders can be expected around Fri, Nov 07, 2025
$135.41 AUD
$162.49 AUD $135.41 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Internal Thread
3/8-16 UNC (9.53mm)

External Thread
9/16-12 UNC

Length
12.7
mm

(Equiv. 0.5 in.)
Inserts Per Kit
6
Size Kits Thread Repair - 3/8-16 UNC -9.53mm- 9/16-12 UNC 12.7 mm - Stainless Steel
Material: Stainless Steel   
Part Number: KLI-0953-KIT-SS
Size Kits Thread Repair - 3/8-16 UNC - 9.53mm - 9/16-12 UNC 12.7 mm Keylocking - Stainless Steel Insert
Out of Stock | Backorder Now | Orders can be expected around Fri, Nov 07, 2025
$135.41 AUD
$162.49 AUD $135.41 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Internal Thread
3/8-16 UNC (9.53mm)

External Thread
9/16-12 UNC

Length
12.7
mm

(Equiv. 0.5 in.)
Inserts Per Kit
6
Size Kits Thread Repair - 3/8-16 UNC -9.53mm- 9/16-12 UNC 12.7 mm - Steel
Material: Steel   
Deleted Item. Available while stocks last.
Part Number: KLI-0953-KIT
Size Kits Thread Repair - 3/8-16 UNC - 9.53mm - 9/16-12 UNC 12.7 mm Keylocking - Steel Insert
1 Available Now | Item Discontinued - Up to 1 may be ordered online. No backorders. Please contact us if you need a larger quantity
$40.39 AUD
$96.89 AUD $40.39 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

1 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Internal Thread
3/8-16 UNC (9.53mm)

External Thread
9/16-12 UNC

Length
12.7
mm

(Equiv. 0.5 in.)
Inserts Per Kit
6
Size Kits Thread Repair - 3/8-16 UNC -9.53mm- 9/16-12 UNC 12.7 mm - Steel
Material: Steel   
Deleted Item. Available while stocks last.
Part Number: KLI-0953-KIT
Size Kits Thread Repair - 3/8-16 UNC - 9.53mm - 9/16-12 UNC 12.7 mm Keylocking - Steel Insert
1 Available Now | Item Discontinued - Up to 1 may be ordered online. No backorders. Please contact us if you need a larger quantity
$40.39 AUD
$96.89 AUD $40.39 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

1 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Internal Thread
7/16-20 UNF (11.11mm)

External Thread
5/8-11 UNC (15.88mm)

Length
15.7
mm

(Equiv. 0.618 in.)
Inserts Per Kit
6
Size Kits Thread Repair - 7/16-20 UNF -11.11mm- 5/8-11 UNC -15.88mm- 15.7 mm - Steel
Material: Steel   
Part Number: KLI-1111-KIT
Size Kits Thread Repair - 7/16-20 UNF - 11.11mm - 5/8-11 UNC - 15.88mm - 15.7 mm Keylocking - Steel Insert
Out of Stock | Backorder Now | Orders can be expected around Fri, Nov 07, 2025
$96.23 AUD
$115.47 AUD $96.23 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Internal Thread
7/16-20 UNF (11.11mm)

External Thread
5/8-11 UNC (15.88mm)

Length
15.7
mm

(Equiv. 0.618 in.)
Inserts Per Kit
6
Size Kits Thread Repair - 7/16-20 UNF -11.11mm- 5/8-11 UNC -15.88mm- 15.7 mm - Steel
Material: Steel   
Part Number: KLI-1111-KIT
Size Kits Thread Repair - 7/16-20 UNF - 11.11mm - 5/8-11 UNC - 15.88mm - 15.7 mm Keylocking - Steel Insert
Out of Stock | Backorder Now | Orders can be expected around Fri, Nov 07, 2025
$96.23 AUD
$115.47 AUD $96.23 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Internal Thread
1/2-13 UNC (12.7mm)

External Thread
3/4-16 UNF (19.05mm)

Length
15.7
mm

(Equiv. 0.618 in.)
Inserts Per Kit
4
Size Kits Thread Repair - 1/2-13 UNC -12.7mm- 3/4-16 UNF -19.05mm- 15.7 mm - Steel
Material: Steel   
Part Number: KLI-1270-KIT
Size Kits Thread Repair - 1/2-13 UNC - 12.7mm - 3/4-16 UNF - 19.05mm - 15.7 mm Keylocking - Steel Insert
Out of Stock | Backorder Now | Orders can be expected around Fri, Nov 07, 2025
$89.05 AUD
$106.85 AUD $89.05 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Internal Thread
1/2-13 UNC (12.7mm)

External Thread
3/4-16 UNF (19.05mm)

Length
15.7
mm

(Equiv. 0.618 in.)
Inserts Per Kit
4
Size Kits Thread Repair - 1/2-13 UNC -12.7mm- 3/4-16 UNF -19.05mm- 15.7 mm - Steel
Material: Steel   
Part Number: KLI-1270-KIT
Size Kits Thread Repair - 1/2-13 UNC - 12.7mm - 3/4-16 UNF - 19.05mm - 15.7 mm Keylocking - Steel Insert
Out of Stock | Backorder Now | Orders can be expected around Fri, Nov 07, 2025
$89.05 AUD
$106.85 AUD $89.05 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Internal Thread
5/8-11 UNC (15.88mm)

External Thread
7/8-14 UNC

Length
22.1
mm

(Equiv. 0.87 in.)
Inserts Per Kit
3
Size Kits Thread Repair - 5/8-11 UNC -15.88mm- 7/8-14 UNC 22.1 mm - Steel
Material: Steel   
Part Number: KLI-1588-KIT
Size Kits Thread Repair - 5/8-11 UNC - 15.88mm - 7/8-14 UNC 22.1 mm Keylocking - Steel Insert
Out of Stock | Backorder Now | Orders can be expected around Fri, Nov 07, 2025
$102.95 AUD
$123.55 AUD $102.95 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Internal Thread
5/8-11 UNC (15.88mm)

External Thread
7/8-14 UNC

Length
22.1
mm

(Equiv. 0.87 in.)
Inserts Per Kit
3
Size Kits Thread Repair - 5/8-11 UNC -15.88mm- 7/8-14 UNC 22.1 mm - Steel
Material: Steel   
Part Number: KLI-1588-KIT
Size Kits Thread Repair - 5/8-11 UNC - 15.88mm - 7/8-14 UNC 22.1 mm Keylocking - Steel Insert
Out of Stock | Backorder Now | Orders can be expected around Fri, Nov 07, 2025
$102.95 AUD
$123.55 AUD $102.95 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Internal Thread
3/4-10 UNC (19.05mm)

External Thread
1.1/8-12 UNF

Length
22.4
mm

(Equiv. 0.882 in.)
Inserts Per Kit
3
Size Kits Thread Repair - 3/4-10 UNC -19.05mm- 1.1/8-12 UNF 22.4 mm - Steel
Material: Steel   
Part Number: KLI-1910-KIT
Size Kits Thread Repair - 3/4-10 UNC - 19.05mm - 1.1/8-12 UNF 22.4 mm Keylocking - Steel Insert
Out of Stock | Backorder Now | Orders can be expected around Fri, Nov 07, 2025
$147.23 AUD
$176.67 AUD $147.23 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Internal Thread
3/4-10 UNC (19.05mm)

External Thread
1.1/8-12 UNF

Length
22.4
mm

(Equiv. 0.882 in.)
Inserts Per Kit
3
Size Kits Thread Repair - 3/4-10 UNC -19.05mm- 1.1/8-12 UNF 22.4 mm - Steel
Material: Steel   
Part Number: KLI-1910-KIT
Size Kits Thread Repair - 3/4-10 UNC - 19.05mm - 1.1/8-12 UNF 22.4 mm Keylocking - Steel Insert
Out of Stock | Backorder Now | Orders can be expected around Fri, Nov 07, 2025
$147.23 AUD
$176.67 AUD $147.23 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.