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1923_bDuMid_B18.21.1-lock.jpg
Dimensions in inches: source ASME B18.21.1 -2009-Table 3 Extra-duty 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 0.208 0.027 0.053
No.3 (0.099)
0.107 0.101 0.239 0.034 0.062
No.4 (0.112)
0.120 0.114 0.253 0.034 0.062
No.5 (0.125)
0.133 0.127 0.300 0.045 0.079
No.6 (0.138)
0.148 0.141 0.314 0.045 0.079
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)