| EXTENDED WASHER DIAMETER | 0.624 INCHES MINIMUM AND 0.676 INCHES MAXIMUM |
| EXTENDED WASHER THICKNESS | 0.035 INCHES MINIMUM AND 0.055 INCHES MAXIMUM |
| FASTENER LENGTH | 0.500 INCHES NOMINAL |
| HARDNESS RATING | 28.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD HEIGHT | 0.243 INCHES MINIMUM AND 0.285 INCHES MAXIMUM |
| HEAD STYLE | HEXAGON EXTENDED WASHER |
| INTERNAL DRIVE STYLE | W/O INTERNAL DRIVE |
| MATERIAL | STEEL OVERALL |
| NONMACHINE NOMINAL THREAD DIAMETER | 0.312 INCHES |
| NONMACHINE THREAD STYLE | BLUNT (SF) OR BLUNT (TYPE SW) OR BLUNT (TYPE TT) |
| SURFACE TREATMENT | PHOSPHATE ZINC OVERALL |
| WIDTH BETWEEN FLATS | 0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM |