A heavy duty self-locking key locking insert, often referred to as a self-locking Keensert, is a type of threaded insert that combines the features of a standard Key Locking Insert (commonly known as a Keensert) with a self-locking mechanism. This combination makes it suitable for applications where both strong threads and resistance to vibrational loosening are required.
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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