General
| Nominal Washer Size | Type | Type Code | T Thickness Basic | T Thickness MAX / MIN | A Inside Diameter Basic | A Inside Diameter + / - | B Outside Diameter Basic | B Outside Diameter + / - |
|---|---|---|---|---|---|---|---|---|
| 0 - / | - | - | .020 | .025 / .016 | .078 | .000 / .005 | .188 | .000 / .005 |
| 2 - / | - | - | .020 | .025 / .016 | .094 | .000 / .005 | .250 | .000 / .005 |
| 4 - / | - | - | .032 | .040 / .025 | .125 | .008 / .005 | .312 | .008 / .005 |
| 6 - .138 | - | - | .049 | .065 / .036 | .156 | .008 / .005 | .375 | .015 / .005 |
| 8 - .164 | - | - | .049 | .065 / .036 | .188 | .008 / .005 | .438 | .015 / .005 |
| 10 - .190 | - | - | .049 | .065 / .036 | .219 | .008 / .005 | .500 | .015 / .005 |
| 3/16 - .188 | - | - | .049 | .065 / .036 | .250 | .015 / .005 | .562 | .015 / .005 |
| 12 - .216 | - | - | .065 | .080 / .051 | .250 | .015 / .005 | .562 | .015 / .005 |
| 1/4 - .250 | Narrow | NAR | .065 | .080 / .051 | .281 | .015 / .005 | .625 | .015 / .005 |
| 1/4 - .250 | Wide | WIDE | .065 | .080 / .051 | .312 | .015 / .005 | .734 | .015 / .007 |
| 5/16 - .312 | Narrow | NAR | .065 | .080 / .051 | .344 | .015 / .005 | .688 | .015 / .007 |
| 5/16 - .312 | Wide | WIDE | .083 | .104 / .064 | .375 | .015 / .005 | .875 | .030 / .007 |
| 3/8 - .375 | Narrow | NAR | .065 | .080 / .051 | .406 | .015 / .005 | .812 | .015 . 007 |
| 3/8 - .375 | Wide | WIDE | .083 | .104 / .064 | .438 | .015 / .005 | 1.000 | .030 / .007 |
| 7/16 - .438 | Narrow | NAR | .065 | .080 / .051 | .469 | .015 / .005 | .922 | .015 / .007 |
| 7/16 - .438 | Wide | WIDE | .083 | .104 / .064 | .500 | .015 / .005 | 1.250 | .030 / .007 |
| 1/2 - .500 | Narrow | NAR | .095 | .121 / .074 | .531 | .015 / .005 | 1.062 | .030 / .007 |
| 1/2 - .500 | Wide | WIDE | .109 | .132 / .086 | .562 | .015 / .005 | 1.375 | .030 / .007 |
| 9/16 - .562 | Narrow | NAR | .095 | .121 / .074 | .594 | .015 / .005 | 1.156 | .030 / .007 |
| 9/16 - .562 | Wide | WIDE | .109 | .132 / .086 | .625 | .015 / .005 | 1.469 | .030 / .007 |
| 5/8 - .625 | Narrow | NAR | .095 | .121 / .074 | .656 | .030 / .007 | 1.312 | .030 / .007 |
| 5/8 - .625 | Wide | WIDE | .134 | .160 / .108 | .688 | .030 / .007 | 1.750 | .030 / .007 |
| 3/4 - .750 | Narrow | NAR | .134 | .160 / .108 | .812 | .030 / .007 | 1.469 | .030 / .007 |
| 3/4 - .750 | Wide | WIDE | .148 | .177 / .122 | .812 | .030 / .007 | 2.000 | .030 / .007 |