| FASTENER LENGTH | 0.719 INCHES MINIMUM AND 0.781 INCHES MAXIMUM |
| HEAD HEIGHT | 0.273 INCHES MINIMUM AND 0.289 INCHES MAXIMUM |
| HEAD STYLE | HEXAGON |
| MATERIAL DOCUMENT AND CLASSIFICATION | 66 FED STD ALL MATERIAL RESPONSES OVERALL |
| MATERIAL | STEEL COMP 1020 OR STEEL COMP 1025 OR STEEL COMP 1030 OVERALL |
| NOMINAL THREAD DIAMETER | 0.375 INCHES |
| PRIMARY WASHER MATERIAL THICKNESS | 0.058 INCHES MINIMUM AND 0.066 INCHES MAXIMUM |
| PRIMARY WASHER OUTSIDE DIAMETER | 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM |
| SPECIAL FEATURES | W/HEADER POINT |
| WASHER QUANTITY | 1 |
| WIDTH BETWEEN FLATS | 0.551 INCHES MINIMUM AND 0.562 INCHES MAXIMUM |
| SURFACE TREATMENT | CADMIUM OR ZINC GRIP |
| SURFACE TREATMENT | CADMIUM OR ZINC HEAD |
| SURFACE TREATMENT | PHOSPHATE THREADS |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.641 INCHES MINIMUM AND 0.672 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 24 |
| THREAD SERIES DESIGNATOR | UNF |