Dimensions of Type A Plain Washers
| Dimensions of Type A Plain Washers | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Normal Washer Size | Series (1) | A | B | C | ||||||
| Inside Diameter | Outside Diameter | Thickness | ||||||||
| Basic | Tolerance | Basic | Tolerance | |||||||
| Plus | Minus | Plus | Minus | Basic | Plus | Minus | ||||
| 1/4 (0.250) | N | 0.281 | 0.015 | 0.005 | 0.625 | 0.015 | 0.007 | 0.065 | 0.080 | 0.051 |
| 1/4 (0.250) | W | 0.312 | 0.015 | 0.005 | 0.734 (2) | 0.015 | 0.007 | 0.065 | 0.080 | 0.051 |
| 3/8 (0.375) | N | 0.406 | 0.015 | 0.005 | 0.812 | 0.015 | 0.007 | 0.065 | 0.080 | 0.051 |
| 3/8 (0.375) | W | 0.438 | 0.015 | 0.005 | 1.000 | 0.030 | 0.007 | 0.083 | 0.104 | 0.064 |
| 1/2 (0.500) | N | 0.531 | 0.015 | 0.005 | 1.062 | 0.030 | 0.007 | 0.095 | 0.121 | 0.074 |
| 1/2 (0.500) | W | 0.562 | 0.015 | 0.005 | 1.375 | 0.030 | 0.007 | 0.109 | 0.132 | 0.086 |
| 5/8 (0.625) | N | 0.656 | 0.030 | 0.007 | 1.312 | 0.030 | 0.007 | 0.095 | 0.121 | 0.074 |
| 5/8 (0.625) | W | 0.688 | 0.030 | 0.007 | 1.750 | 0.030 | 0.007 | 0.134 | 0.160 | 0.108 |
| 3/4 (0.750) | N | 0.812 | 0.030 | 0.007 | 1.469 | 0.030 | 0.007 | 0.134 | 0.160 | 0.108 |
| 3/4 (0.750) | W | 0.812 | 0.030 | 0.007 | 2.000 | 0.030 | 0.007 | 0.148 | 0.177 | 0.122 |
| 7/8 (0.875) | N | 0.938 | 0.030 | 0.007 | 1.750 | 0.030 | 0.007 | 0.134 | 0.160 | 0.180 |
| 7/8 (0.875) | W | 0.938 | 0.030 | 0.007 | 2.250 | 0.030 | 0.007 | 0.165 | 0.192 | 0.136 |
| 1 (1.000) | N | 1.062 | 0.030 | 0.007 | 2.000 | 0.030 | 0.007 | 0.134 | 0.160 | 0.108 |
| 1 (1.000) | W | 1.062 | 0.030 | 0.007 | 2.500 | 0.030 | 0.007 | 0.165 | 0.192 | 0.136 |
| 1-1/8 (1.125) | N | 1.250 | 0.030 | 0.007 | 2.250 | 0.030 | 0.007 | 0.134 | 0.160 | 0.108 |
| 1-1/8 (1.125) | W | 1.250 | 0.030 | 0.007 | 2.750 | 0.030 | 0.007 | 0.165 | 0.192 | 0.136 |
| 1-1/4 (1.250) | N | 1.375 | 0.030 | 0.007 | 2.500 | 0.030 | 0.007 | 0.165 | 0.192 | 0.136 |
| 1-1/4 (1.250) | W | 1.375 | 0.030 | 0.007 | 3.000 | 0.030 | 0.007 | 0.165 | 0.192 | 0.136 |
| 1-3/8 (1.375) | N | 1.500 | 0.030 | 0.007 | 2.750 | 0.030 | 0.007 | 0.165 | 0.192 | 0.136 |
| 1-3/8 (1.375) | W | 1.500 | 0.045 | 0.010 | 3.250 | 0.045 | 0.010 | 0.180 | 0.213 | 0.153 |
| 1-1/2 (1.500) | N | 1.625 | 0.030 | 0.007 | 3.000 | 0.030 | 0.007 | 0.165 | 0.192 | 0.136 |
| 1-1/2 (1.500) | W | 1.625 | 0.045 | 0.010 | 3.500 | 0.045 | 0.010 | 0.180 | 0.213 | 0.153 |
| 1-5/8 (1.625) | -- | 1.750 | 0.045 | 0.010 | 3.750 | 0.045 | 0.010 | 0.180 | 0.213 | 0.153 |
| 1-3/4(1.750) | -- | 1.875 | 0.045 | 0.010 | 4.000 | 0.045 | 0.010 | 0.180 | 0.213 | 0.153 |
| 1-7/8 (1.875) | -- | 2.000 | 0.045 | 0.010 | 4.250 | 0.045 | 0.010 | 0.180 | 0.213 | 0.153 |
| 2 (2.000) | -- | 2.125 | 0.045 | 0.010 | 4.500 | 0.045 | 0.010 | 0.180 | 0.213 | 0.153 |
| 2-1/4 (2.250) | -- | 2.375 | 0.045 | 0.010 | 4.750 | 0.045 | 0.010 | 0.220 | 0.278 | 0.193 |
| 2-1/2 (2.500) | -- | 2.625 | 0.045 | 0.010 | 5.000 | 0.045 | 0.010 | 0.238 | 0.280 | 0.210 |
| 2-3/4 (2.750) | -- | 2.875 | 0.065 | 0.010 | 5.250 | 0.065 | 0.010 | 0.259 | 0.310 | 0.228 |
| 3 (3.000) | -- | 3.125 | 0.065 | 0.010 | 5.500 | 0.065 | 0.010 | 0.284 | 0.327 | 0.249 |