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1922_AhvZDQ_B18.21.1-lock.jpg
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)