| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| THREAD QUANTITY PER INCH | 28 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.400 INCHES MINIMUM AND |
| 0.450 INCHES MAXIMUM |
| FASTENER LENGTH | 1.473 INCHES MINIMUM AND |
| 1.503 INCHES MAXIMUM |
| MATERIAL | STEEL CORROSION RESISTING OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS5732 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| HEAD STYLE | DISHED HEXAGON |
| HEAD HEIGHT | 0.156 INCHES MINIMUM AND |
| 0.171 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.492 INCHES MINIMUM AND |
| 0.502 INCHES MAXIMUM |
| SHOULDER SHAPE | ROUND FIRST SHOULDER |
| SHOULDER DIAMETER | 0.3115 INCHES MINIMUM AND |
| 0.3120 INCHES MAXIMUM FIRST SHOULDER |
| SHOULDER LENGTH | 1.053 INCHES MINIMUM AND |
| 1.073 INCHES MAXIMUM FIRST SHOULDER |
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.285 INCHES MINIMUM AND |
| 1.325 INCHES MAXIMUM FIRST HOLE |
| SHANK UNTHREADED HOLE DIAMETER | 0.076 INCHES MINIMUM AND |
| 0.086 INCHES MAXIMUM FIRST HOLE |
| SPECIAL FEATURES | DRY FILM LUBED SHANK PER MCAIR PSI8021 CLASS 15 DESIGNATED BY LETTER M IN PART NUMBER |
| SUPPLEMENTARY FEATURES | NHA: 74A425000 |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | BOLT,SHOULDER - HEX HEAD,CLOSE TOLERANCE,CORROSION RESISTANT STEEL,UP TO 1200 DEGREES F |