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ASME B 18.21.3 - 2008 (R2013) Double Coil Helical Spring Lock Washers for Wood Structures


Unit:
Nominal Diameter
3/8 1/2 5/8
d Nominal Size
min
max
dc max
a min
max
H min
w min
n max
t min
0.3750 0.5000 0.6250
0.385 0.510 0.635
0.408 0.535 0.660
0.814 1.035 1.284
30° 30° 30°
35° 35° 35°
0.530 0.530 0.785
0.196 0.243 0.302
0.145 0.145 0.220
0.156 0.156 0.234
①,Washers shall be made from material meeting the chemical composition requirements of the following standards: a、up to and including 3/4 in. carbon steel -SAE J403 1055-1065(UNS G10550-G10650); b、7/8 in. and above boron steel -SAE J411 10B55-10B65

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