Split Lock Helical Spring Washer Size Dimension Table Chart ANSI/ASME B18.21.1
ANSI and Metric Hardware Resources Tables and References
American National Standard Helical Spring Lock Washers ANSI/ASME B18.21.1
Helical Split spring lock washers are available in four series: Regular, heavy, extra duty and hi-collar as given below. Helical spring lock washers made of materials other than carbon steel are available in the regular series.
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Note: Section Thickness (T) = (ti + to)/2
Nominal Washer Size |
Inside |
Regular |
Heavy |
Extra Heavy Duty |
|||||||
Max. |
Min. |
O.D. B Max. |
Section Width W |
Section Thickness, T |
O.D. ,B Max. |
Section Width W |
Section Thickness T |
O.D. B Max. |
Section Width W |
Section Thickness T |
|
No. 2 0.086 |
0.094 |
0.088 |
0.172 |
0.035 |
0.020 |
0.182 |
0.040 |
0.025 |
0.208 |
0.053 |
0.027 |
No. 3 0.099 |
0.107 |
0.101 |
0.195 |
0.040 |
0.025 |
0.209 |
0.047 |
0.031 |
0.239 |
0.062 |
0.034 |
No. 4 0.112 |
0.120 |
0.114 |
0.209 |
0.040 |
0.025 |
0.223 |
0.047 |
0.031 |
0.253 |
0.062 |
0.034 |
No. 5 0.125 |
0.133 |
0.127 |
0.236 |
0.047 |
0.031 |
0.252 |
0.055 |
0.040 |
0.300 |
0.079 |
0.045 |
No. 6 0.138 |
0.148 |
0.141 |
0.250 |
0.047 |
0.031 |
0.266 |
0.055 |
0.040 |
0.314 |
0.079 |
0.045 |
No. 8 0.164 |
0.174 |
0.167 |
0.293 |
0.055 |
0.040 |
0.307 |
0.062 |
0.047 |
0.375 |
0.096 |
0.057 |
No. 10 0.190 |
0.200 |
0.193 |
0.334 |
0.062 |
0.047 |
0.350 |
0.070 |
0.056 |
0.434 |
0.112 |
0.068 |
No. 12 0.216 |
0.227 |
0.220 |
0.377 |
0.070 |
0.056 |
0.391 |
0.077 |
0.063 |
0.497 |
0.130 |
0.080 |
1⁄4 0.250 |
0.260 |
0.252 |
0.487 |
0.109 |
0.062 |
0.489 |
0.110 |
0.077 |
0.533 |
0.132 |
0.084 |
5/⁄16 0.3125 |
0.322 |
0.314 |
0.583 |
0.125 |
0.078 |
0.293 |
0.130 |
0.097 |
0.619 |
0.143 |
0.108 |
3/⁄8 0.375 |
0.385 |
0.377 |
0.680 |
0.141 |
0.094 |
0.688 |
0.145 |
0.115 |
0.738 |
0.170 |
0.123 |
7/⁄16 0.4375 |
0.450 |
0.440 |
0.776 |
0.156 |
0.109 |
0.784 |
0.160 |
0.133 |
0.836 |
0.186 |
0.143 |
1/⁄2 0.500 |
0.512 |
0.502 |
0.869 |
0.171 |
0.125 |
0.879 |
0.176 |
0.151 |
0.935 |
0.204 |
0.162 |
9⁄/16 0.5625 |
0.574 |
0.564 |
0.965 |
0.188 |
0.141 |
0.975 |
0.193 |
0.170 |
1.035 |
0.223 |
0.182 |
5⁄/8 0.625 |
0.641 |
0.628 |
1.073 |
0.203 |
0.156 |
1.087 |
0.210 |
0.189 |
1.151 |
0.242 |
0.202 |
1 1/⁄16 0.6875 |
0.704 |
0.691 |
1.170 |
0.219 |
0.172 |
1.186 |
0.227 |
0.207 |
1.252 |
0.260 |
0.221 |
3/⁄4 0.750 |
0.766 |
0.753 |
1.265 |
0.234 |
0.188 |
1.285 |
0.244 |
0.226 |
1.355 |
0.279 |
0.241 |
1 3/⁄16 0.8125 |
0.832 |
0.816 |
1.363 |
0.250 |
0.203 |
1.387 |
0.262 |
0.246 |
1.458 |
0.298 |
0.261 |
7⁄/8 0.875 |
0.894 |
0.878 |
1.459 |
0.266 |
0.219 |
1.489 |
0.281 |
0.266 |
1.571 |
0.322 |
0.285 |
1 5/⁄16 0.9375 |
0.958 |
0.941 |
1.556 |
0.281 |
0.234 |
1.590 |
0.298 |
0.284 |
1.684 |
0.345 |
0.308 |
1 1.000 |
1.024 |
1.003 |
1.656 |
0.297 |
0.250 |
1.700 |
0.319 |
0.306 |
1.794 |
0.366 |
0.330 |
1 1/⁄16 1.0625 |
1.087 |
1.066 |
1.751 |
0.312 |
0.266 |
1.803 |
0.338 |
0.326 |
1.905 |
0.389 |
0.352 |
1 1/⁄8 1.125 |
1.153 |
1.129 |
1.847 |
0.328 |
0.281 |
1.903 |
0.356 |
0.345 |
2.013 |
0.411 |
0.375 |
1 3/⁄16 1.1875 |
1.217 |
1.192 |
1.943 |
0.344 |
0.297 |
2.001 |
0.373 |
0.364 |
2.107 |
0.431 |
0.396 |
1 1/⁄4 1.250 |
1.280 |
1.254 |
2.036 |
0.359 |
0.312 |
2.104 |
0.393 |
0.384 |
2.222 |
0.452 |
0.417 |
1 5/⁄16 1.3125 |
1.344 |
1.317 |
2.133 |
0.375 |
0.328 |
2.203 |
0.410 |
0.403 |
2.327 |
0.472 |
0.438 |
1 3/⁄8 1.375 |
1.408 |
1.379 |
2.219 |
0.391 |
0.344 |
2.301 |
0.427 |
0.422 |
2.429 |
0.491 |
0.458 |
1 7/⁄16 1.4375 |
1.472 |
1.442 |
2.324 |
0.406 |
0.359 |
2.396 |
0.442 |
0.440 |
2.530 |
0.509 |
0.478 |
1 1/⁄2 1.500 |
1.534 |
1.504 |
2.419 |
0.422 |
0.375 |
2.491 |
0.458 |
0.458 |
2.627 |
0.526 |
0.496 |