| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| FASTENER LENGTH | 1.582 INCHES MINIMUM AND 1.602 INCHES MAXIMUM |
| GRIP LENGTH | 1.120 INCHES MINIMUM AND 1.130 INCHES MAXIMUM |
| HEAD MAJOR DIAMETER | 0.461 INCHES MINIMUM AND 0.509 INCHES MAXIMUM |
| HEAD STYLE | FLUSH COUNTERSUNK |
| MATERIAL | STEEL COMP XM-13 OVERALL |
| NOMINAL THREAD SIZE | 0.312 INCHES |
| SHANK DIAMETER | 0.342 INCHES MINIMUM AND 0.343 INCHES MAXIMUM |
| SHANK STYLE | PIN-RIVET, STRAIGHT, THREADED |
| SPECIAL FEATURES | THREAD ROLLED PER MIL-S-8879 (MODIFIED) MAJOR DIAMETER SHALL BE .3020 TO .3060 INCHES. |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) |
| THREAD QUANTITY PER INCH | 24 |
| WIDTH BETWEEN FLATS | 0.127 INCHES MINIMUM AND 0.129 INCHES MAXIMUM |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| THREAD CLASS | 3A |