| FASTENER LENGTH | 1.000 INCHES NOMINAL |
| HEAD HEIGHT | 0.208 INCHES MINIMUM AND 0.230 INCHES MAXIMUM |
| HEAD STYLE | HEXAGON |
| MATERIAL | STEEL COMP 1010 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OVERALL |
| NOMINAL THREAD DIAMETER | 0.312 INCHES |
| PRIMARY WASHER OUTSIDE DIAMETER | 0.567 INCHES MINIMUM AND 0.590 INCHES MAXIMUM |
| PRIMARY WASHER MATERIAL THICKNESS | 0.028 INCHES MINIMUM AND 0.034 INCHES MAXIMUM |
| SPECIAL FEATURES | W/HEADER POINT |
| WASHER QUANTITY | 1 |
| WIDTH BETWEEN FLATS | 0.491 INCHES MINIMUM AND 0.500 INCHES MAXIMUM |
| SURFACE TREATMENT | CADMIUM OR ZINC OVERALL |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.889 INCHES MINIMUM |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) |
| THREAD QUANTITY PER INCH | 18 |