Heavy-duty key-locking inserts are engineered for robust strength, resisting rotation and pullout forces. After installation, locking keys secure them in place through parent material threads. Available in inch and metric sizes, their stainless steel solid bushing maintains thread quality. No special tools needed for installation; standard taps and drills suffice. Pre-assembled self-broaching keys set the depth and prevent unintended rotation.
Material: In Carbon Steel – C1215 or equivalent ; In Stainless Steel – 303 or equivalent
Keys – 302 CRES or equivalent
Finish: Carbon Steel – Zinc Phosphate ; Stainless Steel – Passivated
Tolerances: ±.010 inch or ±.25 mm unless specified otherwise.
Part number | Dimensions | |||||
Standard “KNHM” | Self-locking “KNHML” | Internal thread Ø Tol.- 5H | External thread Ø Tol.- 4h | Shear engagement mm² | L1
± 0,3 |
L4 |
KNHM4X0,7 |
M4X0,7 |
M8X1,25 |
104,9 |
8 |
||
KNHML4X0,7 | 83,1 | 8,0 | ||||
KNHM5X0,8 |
M5X0,8 |
M10X1,25 |
177,7 |
10 |
||
KNHML5X0,8 | 152,7 | 8,7 | ||||
KNHM6X1,0 |
M6X1,0 |
M12X1,25 |
266,7 |
12 |
||
KNHML6X1,0 | 242,5 | 9,5 | ||||
KNHM8X1,25 |
M8X1,25 |
M14X1,5 |
341,6 |
14 |
||
KNHML8X1,25 | 316,4 | 10,0 | ||||
KNHM10X1,5 |
M10X1,5 |
M16X1,5 |
470,2 |
16 |
||
KNHML10X1,5 | 441,4 | 10,0 | ||||
KNHM12X1,75 |
M12X1,75 |
M18X1,5 |
608,5 |
18 |
||
KNHML12X1,75 | 561,8 | 10,7 |
Part number | Dimensions | |||||
Standard “KNHM” | Self-locking “KNHML” | Internal thread Ø Tol.- 5H | External thread Ø Tol.- 4h | Shear engagement mm² | L1
± 0,3 |
L4 |
KNHM14X2,0 |
M14X2,0 |
M20X1,5 |
770,5 |
20 |
||
KNHML14X2,0 | 724,4 | 12,4 | ||||
KNHM16X2,0 |
M16X2,0 |
M22X1,5 |
896,8 |
22 |
||
KNHML16X2,0 | 855,2 | 12,4 | ||||
KNHM18X1,5 |
M18X1,5 |
M24X1,5 |
1084,4 |
24 |
||
KNHML18X1,5 | 1051,5 | 16,8 | ||||
KNHM20X2,5 |
M20X2,5 |
M30X2,0 |
1774,3 |
30 |
||
KNHML20X2,5 | 1736,4 | 17,5 | ||||
KNHM24X3,0 |
M24X3,0 |
M33X2,0 |
2189,4 |
33 |
||
KNHML24X3,0 | 2161,9 | 19,0 |
Part number |
Installation dimensions | Removal dimensions | |||||
modified Core-Ø* |
C’Sink-Ø +0,25 |
Installation thread | Hand installation tool part-no. | Drill | |||
Thread Tol.- 6H | Depth L2 min. | Ø | Depth | ||||
KNHM4X0,7 | 6,90 +0,100
-0,025 |
8,25 |
M8X1,25 |
9,5 |
KRTM4-02 / KNT01- HM4X0,7AU |
5,5 |
4,00 |
KNHML4X0,7 | |||||||
KNHM5X0,8 | 8,80 +0,100
-0,025 |
10,25 |
M10X1,25 |
12,5 |
KRTM5-02 / KNT01- HM5X0,8AU |
7,5 |
4,75 |
KNHML5X0,8 | |||||||
KNHM6X1,0 | 10,80+0,100
-0,025 |
12,25 |
M12X1,25 |
14,5 |
KRTM6-02 / KNT01-HM6X1,0AU |
9,5 |
4,75 |
KNHML6X1,0 | |||||||
KNHM8X1,25 | 12,80+0,130
-0,025 |
14,25 |
M14X1,5 |
16,5 |
KRTM8-02 / KNT01-HM8X1,25AU |
11,5 |
4,75 |
KNHML8X1,25 | |||||||
KNHM10X1,5 | 14,75+0,130
-0,025 |
16,25 |
M16X1,5 |
18,5 |
KRTM10-02 / KNT01-HM10X1,5AU |
13,5 |
4,75 |
KNHML10X1,5 | |||||||
KNHM12X1,75 | 16,75+0,130
-0,025 |
18,25 |
M18X1,5 |
20,5 |
KRTM12-02 / KNT01-HM12X1,75AU |
15,5 |
4,75 |
KNHML12X1,75 |
Part number |
Installation dimensions | Removal dimensions | |||||
modified Core-Ø* |
C’Sink-Ø +0,25 |
Installation thread | Hand installation tool part-no. | Drill | |||
Thread Tol.- 6H | Depth L2 min. | Ø | Depth | ||||
KNHM14X2,0 | 18,75+0,130
-0,025 |
20,25 |
M20X1,5 |
22,5 |
KRTM14-02 / KNT03- HM14X2,0AU |
17,50 |
4,75 |
KNHML14X2,0 | |||||||
KNHM16X2,0 | 20,50+0,130
-0,025 |
22,25 |
M22X1,5 |
24,5 |
KRTM16-02 / KNT03- HM16X2,0AU |
17,75 |
6,35 |
KNHML16X2,0 | |||||||
KNHM18X1,5 | 22,50+0,130
-0,025 |
24,25 |
M24X1,5 |
26,5 |
KRTM18-02 / KNT03- HM18X1,5AU |
19,75 |
6,35 |
KNHML18X1,5 | |||||||
KNHM20X2,5 | 28,00+0,130
-0,025 |
30,25 |
M30X2,0 |
34,5 |
KRTM20-02 / KNT03-HM20X2,5AU |
25,75 |
6,35 |
KNHML20X2,5 | |||||||
KNHM24X3,0 | 31,00+0,130
-0,025 |
33,25 |
M33X2,0 |
37,5 |
KNT03-HM24X3,0AU |
28,75 |
6,35 |
KNHML24X3,0 |
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