ASME B18.21.1 TABLE 2

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Helical spring-lock washers, heavy seriesInformation restricted to registered users: Login | Register now for a 14 day free trial

Dimensions in inches: source ASME B18.21.1 -2009-Table 2 Heavy series
Nominal Washer Size	A max	A min	B max	T mean section thickness (t1+t)/2	W min
No.2 (0.086)	0.094	0.088	0.182	0.025	0.040
No.3 (0.099)	0.107	0.101	0.209	0.031	0.047
No.4 (0.112)	0.120	0.114	0.223	0.031	0.047
No.5 (0.125)	0.133	0.127	0.252	0.040	0.055
No.6 (0.138)	0.148	0.141	0.266	0.040	0.055
No.8 (0.164)
No.10 (0.190)
No.12 (0.216)
1/4 - (0.250)
5/16 - (0.3125)
3/8 - (0.375)
7/16 -(0.4375)
1/2 - (0.5)
9/16 - (0.5625)
5/8 - (0.625)
11/16 - (0.6875)
3/4 - (0.75)
13/16 -(0.8125)
7/8 - (0.875)
15/16 - (0.9375)
1 - (1)
1-1/16 (1.0625)
1-1/8 (1.125)
1-3/16 (1.875)
1- 1/4 (1.25)
1 - 5/16 (1.3125)
1 - 3/8 (1.375)
1 - 7/16 (1.4375)
1 - 1/2 (1.5)
1 - 5/8 (1.625)
1 - 3/4 (1.75)
1 - 7/8 (1.875)
2 (2)
2 - 1/4 (2.5)
2 - 1/2 (2.5)
2 - 3/4 (2.75)
3 (3)

Reproduced by permission of DIN Deutsches Institut für Normung e. V. The definitive version for the implementation of this standard is the edition bearing the most recent date of issue, obtainable from Beuth Verlag GmbH, Burggrafenstraße 6, 10787 Berlin, Germany.
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Standard ASME B18.21.1 TABLE 2