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ASME B18.21.1 TABLE 4 Standard Dimensions for Helical spring-lock washers, inch sizes

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Helical spring-lock washers, High Collar

Dimensional Drawing and Technical Diagrams

1924_3Iv6Zr_b18.21.1-table4.jpg

Key Dimensions and Technical Parameters

Dimensions in inches: source ASME B18.21.1 -2009- Table 4 High Collar
Nominal washer size
A max
 A min
B max
T
mean
section thickness
(t1+t)/2
W min
No.4 (0.112)
 0.120 0.114 0.173 0.022 0.022
No.5 (0.125)
 0.133 0.127 0.202 0.030 0.030
No.6 (0.138)
 0.148 0.141 0.216 0.030 0.030
No.8 (0.164)
 0.174 0.167 0.267 0.047 0.042
No.10 (0.190)
 0.2 0.193 0.294 0.047 0.042
1/4 - (0.250)
 0.26 0.252 0.363 0.078 0.047
5/16 - (0.3125)
 0.322 0.314 0.457 0.093 0.062
3/8 - (0.375)
 0.385 0.377 0.55 0.125 0.076
7/16 -(0.4375)
 0.45 0.44 0.644 0.140 0.090
1/2 - (0.5)
 0.512 0.502 0.733 0.172 0.103
5/8 - (0.625)
 0.641 0.628 0.917 0.203 0.125
3/4 - (0.75)
 0.766 0.753 1.105 0.218 0.154
7/8 - (0.875)
 0.894 0.878 1.291 0.234 0.182
1 - (1)
1.024
 1.003
1.478
0.25
0.208
1-1/8 (1.125) 1.153 1.129 1.663 0.313 0.236
1- 1/4 (1.25) 1.280 1.254 1.790 0.313 0.236
1 - 3/8 (1.375) 1.408 1.379 2.031 0.375 0.292
1 - 1/2 (1.5) 1.534 1.504

2.159

 0.375 0.292
1 - 3/4 (1.75) 1.798 1.758 2.596 0.469 0.383
2 - (2) 2.039 2.008 2.846 0.469 0.383
2 - 1/4 (2.5) 2.293 2.262 3.345 0.508 0.508
2 - 1/2 (2.5) 2.543 2.512 3.595 0.508 0.508
2 - 3/4 (2.75) 2.793 2.762 4.095 0.633 0.633
3 - (3) 3.043 3.012 4.035 0.633 0.633

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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