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BS 1802-6-1951
Type D double coil spring washers-Table 6
Nom
d min
d max
dc
h
H
1/4
0.2656
0.2812
0.513
0.04
0.160
5/16
0.3281
0.3437
0.576
0.048
0.192
3/8
0.3906
0.4062
0.694
0.048
0.192
7/16
0.4531
0.4687
0.757
0.064
0.256
1/2
0.5156
0.5312
0.851
0.064
0.256
9/16
0.5937
0.625
1.008
0.064
0.256
5/8
0.6562
0.6875
1.071
0.08
0.320
3/4
0.7812
0.8125
1.236
0.08
0.320
7/8
0.9062
0.9375
1.401
0.092
0.368
1
1.0312
1.0625
1.566
0.128
0.512
1-1/8
1.1562
1.1875
1.749
0.128
0.512
1-1/4
1.2812
1.3125
1.936
0.128
0.512
1-3/8
1.4062
1.4375
2.061
0.128
0.512
1-1/2
1.5312
1.5625
2.312
0.128
0.512
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