Product Description

A hex nut with metric thread pitch, pre-assembled with a free spinning external tooth lock washer. The locking action is achieved when the nut is tightened against a bearing surface as the teeth of the lock washer dig into it. This is the most popular type of locknut because of its versatility, cost and ease of installation. Doesn't gall screw threads.

Specifications

Nominal Size
Thread Pitch
F
H
I
W
Width Across Flats
Nut Thickness
Width of Washer
Washer Thickness
Max
Min
Max
Max
Min
Ref
M3
0.5
5.5
5.32
2.4
7.2
7
0.45
M4
0.7
7
7.68
3.2
8.1
7.9
0.45
M5
0.8
8
7.78
4.0
9.3
9.1
0.60
M6
1.0
10
9.78
5.0
11.15
10.85
0.60
M8
1.25
13
12.73
6.50
15.1
14.7
0.80
M10
1.5
17
16.73
8.0
19.0
18.6
0.90
M12
1.75
19.0
18.7
10.0
22.0
21.6
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