Keylocking Thread Inserts

In stock

Quickly repair stripped, damaged or worn out threads with a new stronger thread using keylocking inserts. Keylocking inserts are easily installed using standard drills and taps. Once the locking keys are driven down, the insert is tightly locked and will not turn. Steel inserts are C1215, parkerized. Stainless inserts are 303, passivated. Internal threads are class 2B, external threads are 2A. Inserts with internal thread size 5⁄16 or M7 and larger have four locking keys. Smaller sizes have two locking keys. Solid inserts allow you to relocate or fill in holes that are too large. All the inserts listed are in stock for same day shipment.

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Use the filters or search below to find what you're looking for

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Product SKUs information
Quick View Item code Price range Availability Insert Length Minimum Internal Thread Size Maximum Internal Thread Size Brand
KLI-65903
$2.34 - $2.60 148 In stock
0.430 in
5/16-18
Acme Industrial
KLI-65908
$6.29 - $6.99 54 In stock
0.870 in
5/8-11
Acme Industrial
KLI-65906
$4.01 - $4.45 578 In stock
0.620 in
1/2-13
Acme Industrial
KLI-65910
$11.57 - $12.85 9 In stock
1.250 in
7/8-9
Acme Industrial
KLI-65921
$2.10 - $2.33 144 In stock
0.310 in
#10-24
Acme Industrial
KLI-65938
$32.04 - $35.60 6 In stock
0.68 in
1/2-13
Acme Industrial
KLI-65935
$26.06 - $28.96 28 In stock
0.430 in
5/16-18
Acme Industrial
KLI-66101
$2.10 - $2.33 51 In stock
0.310 in
#10-32
Acme Industrial
KLI-66109
$8.74 - $9.71 20 In stock
1.120 in
3/4-16
Acme Industrial
KLI-66110
$6.77 - $7.52 1 In stock
1.250 in
7/8-14
Acme Industrial
KLI-66108
$6.29 - $6.99 3 In stock
0.870 in
5/8-18
Acme Industrial
KLI-66140
$22.97 - $25.52 36 In stock
0.870 in
5/8-18
Acme Industrial
KLI-66153
$4.24 - $4.24 109 In stock
0.472 in
M8 x 1
Acme Industrial
KLI-66136
$26.44 - $29.38 Limited availability
0.500 in
3/8-24
Acme Industrial
KLI-66308
$15.85 - $17.61 Limited availability
0.870 in
5/8-11
Acme Industrial
KLI-66309
$14.04 - $15.60 Limited availability
1.120 in
3/4-10
Acme Industrial
KLI-66323
$6.29 - $6.99 86 In stock
0.430 in
5/16-18
Acme Industrial
KLI-66334
$39.07 - $43.41 5 In stock
0.37 in
1/4-20
Acme Industrial
KLI-66501
$3.97 - $3.97 42 In stock
0.310 in
#10-32
Acme Industrial
KLI-66508
$11.57 - $12.85 17 In stock
0.870 in
5/8-18
Acme Industrial
KLI-66504
$6.72 - $7.47 Limited availability
0.500 in
3/8-24
Acme Industrial
KLI-66526
$12.93 - $14.37 Limited availability
0.620 in
1/2-20
Acme Industrial
KLI-71323
$8.82 - $9.80 10 In stock
0.430 in
5/16-18
Acme Industrial
KLI-71324
$10.16 - $11.29 Limited availability
0.500 in
3/8-16
Acme Industrial
KLI-65941
$42.89 - $47.65 Limited availability
1.12 in
3/4-10
Acme Industrial
  • of 5
Key locking Thread Insert; , Maximum Internal Thread Size=5/16-18, Insert Length=10.9 mm | 0.430 in

KLI-65903

Price Range
$2.60 - $2.34

Stock Levels
148 In stock
Attributes
  • Brand
    Acme Industrial
  • Maximum Internal Thread Size
    5/16-18
  • Maximum External Thread Size
    1/2-13
  • Insert Length
    0.430 in
  • Type
    Keylocking Thread Inserts
Key locking Thread Insert; , Maximum Internal Thread Size=5/8-11, Insert Length=22.1 mm | 0.870 in

KLI-65908

Price Range
$6.99 - $6.29

Stock Levels
54 In stock
Attributes
  • Brand
    Acme Industrial
  • Maximum Internal Thread Size
    5/8-11
  • Maximum External Thread Size
    7/8-14
  • Insert Length
    0.870 in
  • Type
    Keylocking Thread Inserts
Key locking Thread Insert; , Maximum Internal Thread Size=1/2-13, Insert Length=15.7 mm | 0.620 in

KLI-65906

Price Range
$4.45 - $4.01

Stock Levels
578 In stock
Attributes
  • Brand
    Acme Industrial
  • Maximum Internal Thread Size
    1/2-13
  • Maximum External Thread Size
    3/4-16
  • Insert Length
    0.620 in
  • Type
    Keylocking Thread Inserts
Key locking Thread Insert; , Maximum Internal Thread Size=7/8-9, Insert Length=31.8 mm | 1.250 in

KLI-65910

Price Range
$12.85 - $11.57

Stock Levels
9 In stock
Attributes
  • Brand
    Acme Industrial
  • Maximum Internal Thread Size
    7/8-9
  • Maximum External Thread Size
    1-1/4-12
  • Insert Length
    1.250 in
  • Type
    Keylocking Thread Inserts
Key locking Thread Insert; , Maximum Internal Thread Size=#10-24, Insert Length=7.9 mm | 0.310 in

KLI-65921

Price Range
$2.33 - $2.10

Stock Levels
144 In stock
Attributes
  • Brand
    Acme Industrial
  • Maximum Internal Thread Size
    #10-24
  • Maximum External Thread Size
    5/16-18
  • Insert Length
    0.310 in
  • Type
    Keylocking Thread Inserts
Key locking Thread Insert; , Maximum Internal Thread Size=1/2-13, Insert Length=17.3 mm | 0.68 in

KLI-65938

Price Range
$35.60 - $32.04

Stock Levels
6 In stock
Attributes
  • Brand
    Acme Industrial
  • Maximum Internal Thread Size
    1/2-13
  • Maximum External Thread Size
    7/8-14
  • Insert Length
    0.68 in
  • Type
    Keylocking Thread Inserts
Key locking Thread Insert; , Maximum Internal Thread Size=5/16-18, Insert Length=10.9 mm | 0.430 in

KLI-65935

Price Range
$28.96 - $26.06

Stock Levels
28 In stock
Attributes
  • Brand
    Acme Industrial
  • Maximum Internal Thread Size
    5/16-18
  • Maximum External Thread Size
    9/16-12
  • Insert Length
    0.430 in
  • Type
    Keylocking Thread Inserts
Key locking Thread Insert; , Maximum Internal Thread Size=#10-32, Insert Length=7.9 mm | 0.310 in

KLI-66101

Price Range
$2.33 - $2.10

Stock Levels
51 In stock
Attributes
  • Brand
    Acme Industrial
  • Maximum Internal Thread Size
    #10-32
  • Maximum External Thread Size
    3/8-16
  • Insert Length
    0.310 in
  • Type
    Keylocking Thread Inserts
Key locking Thread Insert; , Maximum Internal Thread Size=3/4-16, Insert Length=28.4 mm | 1.120 in

KLI-66109

Price Range
$9.71 - $8.74

Stock Levels
20 In stock
Attributes
  • Brand
    Acme Industrial
  • Maximum Internal Thread Size
    3/4-16
  • Maximum External Thread Size
    1-1/8-12
  • Insert Length
    1.120 in
  • Type
    Keylocking Thread Inserts
Key locking Thread Insert; , Maximum Internal Thread Size=7/8-14, Insert Length=31.8 mm | 1.250 in

KLI-66110

Price Range
$7.52 - $6.77

Stock Levels
1 In stock
Attributes
  • Brand
    Acme Industrial
  • Maximum Internal Thread Size
    7/8-14
  • Maximum External Thread Size
    1-1/4-12
  • Insert Length
    1.250 in
  • Type
    Keylocking Thread Inserts
Key locking Thread Insert; , Maximum Internal Thread Size=5/8-18, Insert Length=22.1 mm | 0.870 in

KLI-66108

Price Range
$6.99 - $6.29

Stock Levels
3 In stock
Attributes
  • Brand
    Acme Industrial
  • Maximum Internal Thread Size
    5/8-18
  • Maximum External Thread Size
    7/8-14
  • Insert Length
    0.870 in
  • Type
    Keylocking Thread Inserts
Key locking Thread Insert; , Maximum Internal Thread Size=5/8-18, Insert Length=22.1 mm | 0.870 in

KLI-66140

Price Range
$25.52 - $22.97

Stock Levels
36 In stock
Attributes
  • Brand
    Acme Industrial
  • Maximum Internal Thread Size
    5/8-18
  • Maximum External Thread Size
    1-12
  • Insert Length
    0.870 in
  • Type
    Keylocking Thread Inserts
Key locking Thread Insert; , Maximum Internal Thread Size=M8 x 1, Insert Length=12.0 mm | 0.472 in

KLI-66153

Price Range
$4.24 - $4.24

Stock Levels
109 In stock
Attributes
  • Brand
    Acme Industrial
  • Maximum Internal Thread Size
    M8 x 1
  • Maximum External Thread Size
    M12 x 1.25
  • Insert Length
    0.472 in
  • Type
    Keylocking Thread Inserts
Key locking Thread Insert; , Maximum Internal Thread Size=3/8-24, Insert Length=12.7 mm | 0.500 in

KLI-66136

Price Range
$29.38 - $26.44

Stock Levels
Limited availability
Attributes
  • Brand
    Acme Industrial
  • Maximum Internal Thread Size
    3/8-24
  • Maximum External Thread Size
    5/8-11
  • Insert Length
    0.500 in
  • Type
    Keylocking Thread Inserts
Key locking Thread Insert; , Maximum Internal Thread Size=5/8-11, Insert Length=22.1 mm | 0.870 in

KLI-66308

Price Range
$17.61 - $15.85

Stock Levels
Limited availability
Attributes
  • Brand
    Acme Industrial
  • Maximum Internal Thread Size
    5/8-11
  • Maximum External Thread Size
    7/8-14
  • Insert Length
    0.870 in
  • Type
    Keylocking Thread Inserts
Key locking Thread Insert; , Maximum Internal Thread Size=3/4-10, Insert Length=28.4 mm | 1.120 in

KLI-66309

Price Range
$15.60 - $14.04

Stock Levels
Limited availability
Attributes
  • Brand
    Acme Industrial
  • Maximum Internal Thread Size
    3/4-10
  • Maximum External Thread Size
    1-1/8-12
  • Insert Length
    1.120 in
  • Type
    Keylocking Thread Inserts
Key locking Thread Insert; , Maximum Internal Thread Size=5/16-18, Insert Length=10.9 mm | 0.430 in

KLI-66323

Price Range
$6.99 - $6.29

Stock Levels
86 In stock
Attributes
  • Brand
    Acme Industrial
  • Maximum Internal Thread Size
    5/16-18
  • Maximum External Thread Size
    7/16-14
  • Insert Length
    0.430 in
  • Type
    Keylocking Thread Inserts
Key locking Thread Insert; , Maximum Internal Thread Size=1/4-20, Insert Length=9.4 mm | 0.37 in

KLI-66334

Price Range
$43.41 - $39.07

Stock Levels
5 In stock
Attributes
  • Brand
    Acme Industrial
  • Maximum Internal Thread Size
    1/4-20
  • Maximum External Thread Size
    1/2-13
  • Insert Length
    0.37 in
  • Type
    Keylocking Thread Inserts
Key locking Thread Insert; , Maximum Internal Thread Size=#10-32, Insert Length=7.9 mm | 0.310 in

KLI-66501

Price Range
$3.97 - $3.97

Stock Levels
42 In stock
Attributes
  • Brand
    Acme Industrial
  • Maximum Internal Thread Size
    #10-32
  • Maximum External Thread Size
    3/8-16
  • Insert Length
    0.310 in
  • Type
    Keylocking Thread Inserts
Key locking Thread Insert; , Maximum Internal Thread Size=5/8-18, Insert Length=22.1 mm | 0.870 in

KLI-66508

Price Range
$12.85 - $11.57

Stock Levels
17 In stock
Attributes
  • Brand
    Acme Industrial
  • Maximum Internal Thread Size
    5/8-18
  • Maximum External Thread Size
    7/8-14
  • Insert Length
    0.870 in
  • Type
    Keylocking Thread Inserts
Key locking Thread Insert; , Maximum Internal Thread Size=3/8-24, Insert Length=12.7 mm | 0.500 in

KLI-66504

Price Range
$7.47 - $6.72

Stock Levels
Limited availability
Attributes
  • Brand
    Acme Industrial
  • Maximum Internal Thread Size
    3/8-24
  • Maximum External Thread Size
    9/16-12
  • Insert Length
    0.500 in
  • Type
    Keylocking Thread Inserts
Key locking Thread Insert; , Maximum Internal Thread Size=1/2-20, Insert Length=15.7 mm | 0.620 in

KLI-66526

Price Range
$14.37 - $12.93

Stock Levels
Limited availability
Attributes
  • Brand
    Acme Industrial
  • Maximum Internal Thread Size
    1/2-20
  • Maximum External Thread Size
    5/8-11
  • Insert Length
    0.620 in
  • Type
    Keylocking Thread Inserts
Key locking Thread Insert; , Maximum Internal Thread Size=5/16-18, Insert Length=10.9 mm | 0.430 in

KLI-71323

Price Range
$9.80 - $8.82

Stock Levels
10 In stock
Attributes
  • Brand
    Acme Industrial
  • Maximum Internal Thread Size
    5/16-18
  • Maximum External Thread Size
    7/16-14
  • Insert Length
    0.430 in
  • Type
    Keylocking Thread Inserts
Key locking Thread Insert; , Maximum Internal Thread Size=3/8-16, Insert Length=12.7 mm | 0.500 in

KLI-71324

Price Range
$11.29 - $10.16

Stock Levels
Limited availability
Attributes
  • Brand
    Acme Industrial
  • Maximum Internal Thread Size
    3/8-16
  • Maximum External Thread Size
    1/2-13
  • Insert Length
    0.500 in
  • Type
    Keylocking Thread Inserts
Key locking Thread Insert; , Maximum Internal Thread Size=3/4-10, Insert Length=28.4 mm | 1.12 in

KLI-65941

Price Range
$47.65 - $42.89

Stock Levels
Limited availability
Attributes
  • Brand
    Acme Industrial
  • Maximum Internal Thread Size
    3/4-10
  • Maximum External Thread Size
    1-1/4-12
  • Insert Length
    1.12 in
  • Type
    Keylocking Thread Inserts

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Product facets

Product Range Tooling & Positioning

Product Set Thread Inserts

Type Key-Locking Thread Inserts

Material Stainless Steel Steel

Brand Acme Industrial