| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.500 INCHES |
| THREAD QUANTITY PER INCH | 20 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.355 INCHES MINIMUM AND |
| 0.365 INCHES MAXIMUM |
| FASTENER LENGTH | 3.530 INCHES NOMINAL |
| MATERIAL | STEEL COMP 4140 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5626 COND B MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | CHROMIUM OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | PS13102 FSCM 76301 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| STYLE DESIGNATOR | CONCENTRIC HOLE UNTHREADED |
| SHOULDER DIAMETER | 0.623 INCHES MINIMUM AND |
| 0.624 INCHES MAXIMUM |
| SHOULDER LENGTH | 3.090 INCHES MINIMUM AND |
| 3.100 INCHES MAXIMUM |
| CONCENTRIC HOLE DIAMETER | 0.280 INCHES NOMINAL |
| HEAD STYLE | ROUND W/WRENCH FLATS CHAMFERED |
| HEAD DIAMETER | 1.000 INCHES NOMINAL |
| HEAD HEIGHT | 0.156 INCHES NOMINAL |
| WIDTH BETWEEN FLATS | 0.870 INCHES NOMINAL |
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 3.375 INCHES NOMINAL FIRST HOLE |
| SHANK UNTHREADED HOLE DIAMETER | 0.141 INCHES MINIMUM AND |
| 0.151 INCHES MAXIMUM FIRST HOLE |
| THE MANUFACTURERS DATA | |
| MANUFACTURERS CODE | 76301 |
| DESIGN CONTROL REFERENCE | 68A450752-2001 |