Washers
METRIC
Regular Split
Lockwasher
T
W
A B
METRIC - S
PLIT
L
OCKWASHERS
A
Nominal Washer Size
Max
M2
M2.5
M3
M4
M5
M6
M8
M10
M12
M16
M20
M24
M30
M36
M42
M48
2.4
2.9
3.4
4.4
5.4
6.5
8.5
10.7
12.7
17.0
21.2
25.5
31.7
37.7
43.7
50.5
Inside Diameter
Min
2.1
2.6
3.1
4.1
5.1
6.1
8.1
10.2
12.2
16.2
20.2
24.5
30.5
36.5
42.5
49
B
Outside Diameter
Ref
4.4
5.1
6.2
7.6
9.2
11.8
14.8
18.1
21.1
27.4
33.6
40
48.2
58.2
68.2
75
T
Section Thickness
Ref
0.50
0.60
0.80
0.90
1.20
1.60
2
2.2
2.5
3.5
4
5
6
6
7
7
W
DIN 127B
Section Width
Ref
0.9
1
1.3
1.5
1.8
2.5
3
3.5
4
5
6
7
8
10
12
12
Description
Applications/
Advantages
Material
Hardness
Plating
A coiled, hardened, split circular washer with a slightly trapezoidal wire section, for use with metric screws.
(A) Applies greater bolt tension per unit of applied torque; (B) Provides a hardened bearing surface, creating more uniform torque
control; (C) Provides more uniform load distribution; (D) Resists loosening caused by vibration and corrosion;
(E) Is preferred lockwasher for use with hardened bearing surfaces.
Spring steel
Rockwell C 44 - 51
See Appendix-A for information about the plating of carbon steel and alloy steel lock washers.
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