Stud bolt U-Bolt Flat washer plain washer Inconel 625 Nickel Alloy Fasteners
1.ANSI/ASME B 18.22.1 - 1965 (R1998) Dimens ions of Type B Plain Washers

Nominal Diameter d | 5# | 5# | 6# | 6# | 6# | 8# | 8# | 8# | 10# | 10# | 10# | 12# | 12# | 12# | 1/4 | 1/4 | |
d | Nominal Size | Series | d1 | Nominal Size | max | min | dc | Nominal Size | max | min | h | Nominal Size | max | min | | 0.125 | 0.125 | 0.138 | 0.138 | 0.138 | 0.164 | 0.164 | 0.164 | 0.190 | 0.190 | 0.190 | 0.216 | 0.216 | 0.216 | 0.250 | 0.250 | R | W | N | R | W | N | R | W | N | R | W | N | R | W | N | R | 0.141 | 0.141 | 0.156 | 0.156 | 0.156 | 0.188 | 0.188 | 0.188 | 0.203 | 0.203 | 0.203 | 0.234 | 0.234 | 0.234 | 0.281 | 0.281 | 0.149 | 0.149 | 0.156 | 0.164 | 0.164 | 0.196 | 0.196 | 0.196 | 0.211 | 0.211 | 0.211 | 0.242 | 0.242 | 0.242 | 0.296 | 0.296 | 0.136 | 0.136 | 0.151 | 0.151 | 0.151 | 0.183 | 0.183 | 0.183 | 0.198 | 0.198 | 0.198 | 0.229 | 0.229 | 0.229 | 0.276 | 0.276 | 0.406 | 0.500 | 0.312 | 0.438 | 0.562 | 0.375 | 0.500 | 0.625 | 0.406 | 0.562 | 0.734* | 0.438 | 0.625 | 0.875 | 0.500 | 0.734* | 0.414 | 0.508 | 0.312 | 0.446 | 0.570 | 0.383 | 0.508 | 0.640 | 0.414 | 0.570 | 0.749 | 0.446 | 0.640 | 0.890 | 0.515 | 0.749 | 0.401 | 0.495 | 0.307 | 0.433 | 0.557 | 0.37 | 0.495 | 0.62 | 0.401 | 0.557 | 0.727 | 0.433 | 0.62 | 0.868 | 0.495 | 0.727 | 0.040 | 0.040 | 0.032 | 0.040 | 0.040 | 0.040 | 0.040 | 0.063 | 0.040 | 0.040 | 0.063 | 0.040 | 0.063 | 0.063 | 0.063 | 0.063 | 0.045 | 0.045 | 0.036 | 0.045 | 0.045 | 0.045 | 0.045 | 0.071 | 0.045 | 0.045 | 0.071 | 0.045 | 0.071 | 0.071 | 0.071 | 0.071 | 0.036 | 0.036 | 0.028 | 0.036 | 0.036 | 0.036 | 0.036 | 0.056 | 0.036 | 0.036 | 0.056 | 0.036 | 0.056 | 0.056 | 0.056 | 0.056 | |
Nominal Diameter d | 1/4 | 5/16 | 5/16 | 5/16 | 3/8 | 3/8 | 3/8 | 7/16 | 7/16 | 7/16 | 1/2 | 1/2 | 1/2 | 9/16 | 9/16 | 9/16 | |
d | Nominal Size | Series | d1 | Nominal Size | max | min | dc | Nominal Size | max | min | h | Nominal Size | max | min | | 0.250 | 0.313 | 0.313 | 0.313 | 0.375 | 0.375 | 0.375 | 0.438 | 0.438 | 0.438 | 0.500 | 0.500 | 0.500 | 0.563 | 0.563 | 0.563 | W | N | R | W | N | R | W | N | R | W | N | R | W | N | R | W | 0.281 | 0.344 | 0.344 | 0.344 | 0.406 | 0.406 | 0.406 | 0.469 | 0.469 | 0.469 | 0.531 | 0.531 | 0.531 | 0.594 | 0.594 | 0.594 | 0.296 | 0.359 | 0.359 | 0.359 | 0.421 | 0.421 | 0.421 | 0.484 | 0.484 | 0.484 | 0.546 | 0.546 | 0.546 | 0.609 | 0.609 | 0.609 | 0.276 | 0.339 | 0.339 | 0.339 | 0.401 | 0.401 | 0.401 | 0.464 | 0.464 | 0.464 | 0.526 | 0.526 | 0.526 | 0.589 | 0.589 | 0.589 | 1.000 | 0.625 | 0.875 | 1.125 | 0.734* | 1.000 | 1.250 | 0.875 | 1.125 | 1.469* | 1.000 | 1.250 | 1.750 | 1.125 | 1.469* | 2.000 | 1.015 | 0.640 | 0.890 | 1.140 | 0.749 | 1.015 | 1.280 | 0.890 | 1.140 | 1.499 | 1.015 | 1.280 | 1.780 | 1.140 | 1.499 | 2.030 | 0.993 | 0.62 | 0.868 | 1.118 | 0.727 | 0.993 | 1.243 | 0.868 | 1.118 | 1.462 | 0.993 | 1.243 | 1.743 | 1.118 | 1.462 | 1.993 | 0.063 | 0.063 | 0.063 | 0.063 | 0.063 | 0.063 | 0.100 | 0.063 | 0.063 | 0.100 | 0.063 | 0.100 | 0.100 | 0.063 | 0.100 | 0.100 | 0.071 | 0.071 | 0.071 | 0.071 | 0.071 | 0.071 | 0.112 | 0.071 | 0.071 | 0.112 | 0.071 | 0.112 | 0.112 | 0.071 | 0.112 | 0.112 | 0.056 | 0.056 | 0.056 | 0.056 | 0.056 | 0.056 | 0.090 | 0.056 | 0.056 | 0.090 | 0.056 | 0.090 | 0.090 | 0.056 | 0.090 | 0.090 | |
Nominal Diameter d | 5/8 | 5/8 | 5/8 | 3/4 | 3/4 | 3/4 | 7/8 | 7/8 | 7/8 | 1 | 1 | 1 | 1-1/8 | 1-1/8 | 1-1/8 | 1-1/4 | |
d | Nominal Size | Series | d1 | Nominal Size | max | min | dc | Nominal Size | max | min | h | Nominal Size | max | min | | 0.625 | 0.625 | 0.625 | 0.750 | 0.750 | 0.750 | 0.875 | 0.875 | 0.875 | 1.000 | 1.000 | 1.000 | 1.125 | 1.125 | 1.125 | 1.250 | N | R | W | N | R | W | N | R | W | N | R | W | N | R | W | N | 0.656 | 0.656 | 0.656 | 0.812 | 0.812 | 0.812 | 0.938 | 0.938 | 0.938 | 1.062 | 1.062 | 1.062 | 1.188 | 1.188 | 1.188 | 1.312 | 0.686 | 0.686 | 0.686 | 0.842 | 0.842 | 0.842 | 0.968 | 0.968 | 0.968 | 1.092 | 1.092 | 1.092 | 1.218 | 1.218 | 1.218 | 1.342 | 0.649 | 0.649 | 0.649 | 0.805 | 0.805 | 0.805 | 0.931 | 0.931 | 0.931 | 1.055 | 1.055 | 1.055 | 1.181 | 1.181 | 1.181 | 1.305 | 1.250 | 1.750 | 2.250 | 1.375 | 2.000 | 2.500 | 1.469* | 2.250 | 2.750 | 1.750 | 2.500 | 3.000 | 2.000 | 2.750 | 3.250 | 2.250 | 1.280 | 1.780 | 2.280 | 1.405 | 2.030 | 2.530 | 1.499 | 2.280 | 2.780 | 1.780 | 2.530 | 3.030 | 2.030 | 2.780 | 3.280 | 2.280 | 1.243 | 1.743 | 2.243 | 1.368 | 1.993 | 2.493 | 1.462 | 2.243 | 2.743 | 1.743 | 2.493 | 2.993 | 1.993 | 2.743 | 3.243 | 2.243 | 0.100 | 0.100 | 0.160 | 0.100 | 0.100 | 0.160 | 0.100 | 0.160 | 0.160 | 0.100 | 0.160 | 0.160 | 0.100 | 0.160 | 0.160 | 0.160 | 0.112 | 0.112 | 0.174 | 0.112 | 0.112 | 0.174 | 0.112 | 0.174 | 0.174 | 0.112 | 0.174 | 0.174 | 0.112 | 0.174 | 0.174 | 0.174 | 0.090 | 0.090 | 0.146 | 0.090 | 0.090 | 0.146 | 0.090 | 0.146 | 0.146 | 0.090 | 0.146 | 0.146 | 0.090 | 0.146 | 0.146 | 0.146 | |
Nominal Diameter d | 1-1/4 | 1-1/4 | 1-3/8 | 1-3/8 | 1-3/8 | 1-1/2 | 1-1/2 | 1-1/2 | 1-5/8 | 1-5/8 | 1-5/8 | 1-3/4 | 1-3/4 | 1-3/4 | 1-7/8 | 1-7/8 | |
d | Nominal Size | Series | d1 | Nominal Size | max | min | dc | Nominal Size | max | min | h | Nominal Size | max | min | | 1.250 | 1.250 | 1.375 | 1.375 | 1.375 | 1.500 | 1.500 | 1.500 | 1.625 | 1.625 | 1.625 | 1.750 | 1.750 | 1.750 | 1.875 | 1.875 | R | W | N | R | W | N | R | W | N | R | W | N | R | W | N | R | 1.312 | 1.312 | 1.438 | 1.438 | 1.438 | 1.562 | 1.562 | 1.562 | 1.750 | 1.750 | 1.750 | 1.875 | 1.875 | 1.875 | 2.000 | 2.000 | 1.342 | 1.357 | 1.468 | 1.468 | 1.483 | 1.592 | 1.607 | 1.607 | 1.780 | 1.795 | 1.795 | 1.905 | 1.920 | 1.920 | 2.045 | 2.045 | 1.305 | 1.302 | 1.431 | 1.431 | 1.428 | 1.555 | 1.552 | 1.552 | 1.743 | 1.74 | 1.74 | 1.868 | 1.865 | 1.865 | 1.99 | 1.99 | 3.000 | 3.500 | 2.500 | 3.250 | 3.750 | 2.750 | 3.500 | 4.000 | 3.000 | 3.750 | 4.250 | 3.250 | 4.000 | 4.500 | 3.500 | 4.230 | 3.030 | 3.545 | 2.530 | 3.280 | 3.795 | 2.780 | 3.545 | 4.045 | 3.030 | 3.795 | 4.295 | 3.280 | 4.045 | 4.545 | 3.545 | 4.275 | 2.993 | 3.49 | 2.493 | 3.243 | 3.74 | 2.743 | 3.49 | 3.99 | 2.993 | 3.74 | 4.24 | 3.243 | 3.99 | 4.49 | 3.49 | 4.22 | 0.160 | 0.250 | 0.160 | 0.160 | 0.250 | 0.160 | 0.250 | 0.250 | 0.160 | 0.250 | 0.250 | 0.160 | 0.250 | 0.250 | 0.250 | 0.250 | 0.174 | 0.266 | 0.174 | 0.174 | 0.266 | 0.174 | 0.266 | 0.266 | 0.174 | 0.266 | 0.266 | 0.174 | 0.266 | 0.266 | 0.266 | 0.266 | 0.146 | 0.234 | 0.146 | 0.146 | 0.234 | 0.146 | 0.234 | 0.234 | 0.146 | 0.234 | 0.234 | 0.146 | 0.234 | 0.234 | 0.234 | 0.234 | |
Nominal Diameter d | 1-7/8 | 2 | 2 | 2 | 2-1/4 | 2-1/4 | 2-1/4 | 2-1/2 | 2-1/2 | 2-1/2 | 2-3/4 | 2-3/4 | 2-3/4 | 3 | 3 | 3 | |
d | Nominal Size | Series | d1 | Nominal Size | max | min | dc | Nominal Size | max | min | h | Nominal Size | max | min | | 1.875 | 2.000 | 2.000 | 2.000 | 2.250 | 2.250 | 2.250 | 2.500 | 2.500 | 2.500 | 2.750 | 2.750 | 2.750 | 3.000 | 3.000 | 3.000 | W | N | R | W | N | R | W | N | R | W | N | R | W | N | R | W | 2.000 | 2.125 | 2.125 | 2.125 | 2.375 | 2.375 | 2.375 | 2.625 | 2.625 | 2.625 | 2.875 | 2.875 | 2.875 | 3.125 | 3.125 | 3.125 | 2.045 | 2.170 | 2.170 | 2.170 | 2.420 | 2.420 | 2.440 | 2.670 | 2.690 | 2.690 | 2.920 | 2.940 | 2.940 | 3.190 | 3.190 | 3.190 | 1.99 | 2.115 | 2.115 | 2.115 | 2.365 | 2.365 | 2.365 | 2.615 | 2.615 | 2.615 | 2.865 | 2.865 | 2.865 | 3.115 | 3.115 | 3.115 | 4.750 | 3.750 | 4.500 | 5.000 | 4.000 | 5.000 | 5.500 | 4.500 | 5.500 | 6.000 | 5.000 | 6.000 | 6.500 | 5.500 | 6.500 | 7.000 | 4.795 | 3.795 | 4.545 | 5.045 | 4.045 | 5.045 | 5.565 | 4.545 | 5.565 | 6.065 | 5.045 | 6.065 | 6.565 | 5.565 | 6.565 | 7.065 | 4.74 | 3.74 | 4.49 | 4.99 | 3.99 | 4.99 | 5.49 | 4.49 | 5.49 | 5.99 | 4.99 | 5.99 | 6.49 | 5.49 | 6.49 | 6.99 | 0.250 | 0.250 | 0.250 | 0.250 | 0.250 | 0.250 | 0.375 | 0.250 | 0.375 | 0.375 | 0.250 | 0.375 | 0.375 | 0.375 | 0.375 | 0.375 | 0.266 | 0.266 | 0.266 | 0.266 | 0.266 | 0.266 | 0.393 | 0.266 | 0.393 | 0.393 | 0.266 | 0.393 | 0.393 | 0.393 | 0.393 | 0.393 | 0.234 | 0.234 | 0.234 | 0.234 | 0.234 | 0.234 | 0.357 | 0.234 | 0.357 | 0.357 | 0.234 | 0.357 | 0.357 | 0.357 | 0.357 | 0.357 | |
Nominal Diameter d | 0# | 0# | 0# | 1# | 1# | 1# | 2# | 2# | 2# | 3# | 3# | 3# | 4# | 4# | 4# | 5# | |
d | Nominal Size | Series | d1 | Nominal Size | max | min | dc | Nominal Size | max | min | h | Nominal Size | max | min | | 0.060 | 0.060 | 0.060 | 0.073 | 0.073 | 0.073 | 0.086 | 0.086 | 0.086 | 0.099 | 0.099 | 0.099 | 0.112 | 0.112 | 0.112 | 0.125 | N | R | W | N | R | W | N | R | W | N | R | W | N | R | W | N | 0.068 | 0.068 | 0.068 | 0.084 | 0.084 | 0.084 | 0.094 | 0.094 | 0.094 | 0.109 | 0.109 | 0.109 | 0.125 | 0.125 | 0.125 | 0.141 | 0.068 | 0.068 | 0.068 | 0.084 | 0.084 | 0.084 | 0.094 | 0.094 | 0.094 | 0.109 | 0.109 | 0.117 | 0.125 | 0.133 | 0.133 | 0.141 | 0.063 | 0.063 | 0.063 | 0.079 | 0.079 | 0.079 | 0.089 | 0.089 | 0.089 | 0.104 | 0.104 | 0.104 | 0.12 | 0.12 | 0.12 | 0.136 | 0.125 | 0.188 | 0.250 | 0.156 | 0.219 | 0.281 | 0.188 | 0.250 | 0.344 | 0.219 | 0.312 | 0.406 | 0.250 | 0.375 | 0.438 | 0.281 | 0.125 | 0.188 | 0.250 | 0.156 | 0.219 | 0.281 | 0.188 | 0.250 | 0.344 | 0.219 | 0.312 | 0.414 | 0.250 | 0.383 | 0.446 | 0.281 | 0.12 | 0.183 | 0.245 | 0.151 | 0.214 | 0.276 | 0.183 | 0.245 | 0.339 | 0.214 | 0.307 | 0.401 | 0.245 | 0.37 | 0.433 | 0.276 | 0.025 | 0.025 | 0.025 | 0.025 | 0.025 | 0.032 | 0.025 | 0.032 | 0.032 | 0.025 | 0.032 | 0.040 | 0.032 | 0.040 | 0.040 | 0.032 | 0.028 | 0.028 | 0.028 | 0.028 | 0.028 | 0.036 | 0.028 | 0.036 | 0.036 | 0.028 | 0.036 | 0.045 | 0.036 | 0.045 | 0.045 | 0.036 | 0.022 | 0.022 | 0.022 | 0.022 | 0.022 | 0.028 | 0.022 | 0.028 | 0.028 | 0.022 | 0.028 | 0.036 | 0.028 | 0.036 | 0.036 | 0.028 | |
2.ANSI/ASME B 18.21.1 - 2009 Dimensions of Regular Helical Spring-Lock Washers
Unit: inch |
Screw Thread d | 9/16 | 5/8 | 11/16 | 3/4 | 13/16 | 7/8 | 15/16 | 1 | 1-1/16 | 1-1/8 | 1-3/16 | 1-1/4 | 1-5/16 | |
d | Nominal Size | max | min | dc | max | h | min | n | min | | 0.5625 | 0.6250 | 0.6875 | 0.7500 | 0.8125 | 0.8750 | 0.9375 | 1.0000 | 1.0625 | 1.1250 | 1.1875 | 1.2500 | 1.3125 | 0.574 | 0.641 | 0.704 | 0.766 | 0.832 | 0.894 | 0.958 | 1.024 | 1.087 | 1.153 | 1.217 | 1.280 | 1.344 | 0.564 | 0.628 | 0.691 | 0.753 | 0.816 | 0.878 | 0.941 | 1.003 | 1.066 | 1.129 | 1.192 | 1.254 | 1.317 | 0.965 | 1.073 | 1.170 | 1.265 | 1.363 | 1.459 | 1.556 | 1.656 | 1.751 | 1.847 | 1.943 | 2.036 | 2.133 | 0.141 | 0.156 | 0.172 | 0.188 | 0.203 | 0.219 | 0.234 | 0.250 | 0.266 | 0.281 | 0.297 | 0.312 | 0.328 | 0.188 | 0.203 | 0.219 | 0.234 | 0.250 | 0.266 | 0.281 | 0.297 | 0.312 | 0.328 | 0.344 | 0.359 | 0.375 | |
Screw Thread d | 1-3/8 | 1-7/16 | 1-1/2 | 1-5/8 | 1-3/4 | 1-7/8 | 2 | 2-1/4 | 2-1/2 | 2-3/4 | 3 | |
d | Nominal Size | max | min | dc | max | h | min | n | min | | 1.3750 | 1.4375 | 1.5000 | 1.6250 | 1.7500 | 1.8750 | 2.0000 | 2.2500 | 2.5000 | 2.7500 | 3.0000 | 1.408 | 1.472 | 1.534 | 1.663 | 1.789 | 1.914 | 2.039 | 2.293 | 2.543 | 2.793 | 3.043 | 1.379 | 1.442 | 1.504 | 1.633 | 1.758 | 1.883 | 2.008 | 2.262 | 2.512 | 2.762 | 3.012 | 2.219 | 2.324 | 2.419 | 2.553 | 2.679 | 2.811 | 2.936 | 3.221 | 3.471 | 3.824 | 4.074 | 0.344 | 0.359 | 0.375 | 0.389 | 0.389 | 0.422 | 0.422 | 0.440 | 0.440 | 0.458 | 0.458 | 0.391 | 0.406 | 0.422 | 0.424 | 0.424 | 0.427 | 0.427 | 0.442 | 0.442 | 0.491 | 0.491 | |
Screw Thread d | 2# | 3# | 4# | 5# | 6# | 8# | 10# | 12# | 1/4 | 5/16 | 3/8 | 7/16 | 1/2 | |
d | Nominal Size | max | min | dc | max | h | min | n | min | | 0.0860 | 0.0990 | 0.1120 | 0.1250 | 0.1380 | 0.1640 | 0.1900 | 0.2160 | 0.2500 | 0.3125 | 0.3750 | 0.4375 | 0.5000 | 0.094 | 0.107 | 0.120 | 0.133 | 0.148 | 0.174 | 0.200 | 0.227 | 0.260 | 0.322 | 0.385 | 0.450 | 0.512 | 0.088 | 0.101 | 0.114 | 0.127 | 0.141 | 0.167 | 0.193 | 0.220 | 0.252 | 0.314 | 0.377 | 0.440 | 0.502 | 0.172 | 0.195 | 0.209 | 0.236 | 0.250 | 0.293 | 0.334 | 0.377 | 0.487 | 0.583 | 0.680 | 0.776 | 0.869 | 0.020 | 0.025 | 0.025 | 0.031 | 0.031 | 0.040 | 0.047 | 0.056 | 0.062 | 0.078 | 0.094 | 0.109 | 0.125 | 0.035 | 0.040 | 0.040 | 0.047 | 0.047 | 0.055 | 0.062 | 0.070 | 0.109 | 0.125 | 0.141 | 0.156 | 0.171 | |