THREAD SERIES DESIGNATOR | UNJF |
NOMINAL THREAD DIAMETER | 0.438 INCHES |
THREAD QUANTITY PER INCH | 20 |
THREAD CLASS | 3A |
THREAD DIRECTION | RIGHT-HAND |
THREAD LENGTH | 0.453 INCHES NOMINAL |
FASTENER LENGTH | 1.953 INCHES NOMINAL |
MATERIAL | STEEL COMP E4340 OR |
| STEEL COMP 8740 OVERALL |
MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR |
| MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OR |
| AMS 6322 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
SURFACE TREATMENT | CADMIUM AND |
| CHROMATE OVERALL |
| CHROMIUM BEARING SURFACE OF HEAD |
| CHROMIUM GRIP |
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| QQ-C-320 CL 2 TY 1 FED SPEC SINGLE TREATMENT RESPONSE BEARING SURFACE OF HEAD |
| QQ-C-320 CL 2 TY 1 FED SPEC SINGLE TREATMENT RESPONSE GRIP |
MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
HEAD STYLE | DISHED HEXAGON |
HEAD HEIGHT | 0.219 INCHES MINIMUM AND |
| 0.234 INCHES MAXIMUM |
WIDTH BETWEEN FLATS | 0.679 INCHES MINIMUM AND |
| 0.690 INCHES MAXIMUM |
HOLE CONFIGURATION STYLE | HEXAGON CORNERS |
HOLE TYPE | DRILLED |
HOLE QUANTITY | 3 |
HOLE DIAMETER | 0.070 INCHES MINIMUM AND |
| 0.080 INCHES MAXIMUM |
GRIP LENGTH | 1.490 INCHES MINIMUM AND |
| 1.510 INCHES MAXIMUM |
GRIP DIAMETER | 0.4358 INCHES MINIMUM AND |
| 0.4369 INCHES MAXIMUM |
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.829 INCHES NOMINAL FIRST HOLE |
| 1.829 INCHES NOMINAL SECOND HOLE |
SHANK UNTHREADED HOLE DIAMETER | 0.106 INCHES MINIMUM AND |
| 0.116 INCHES MAXIMUM FIRST HOLE |
| 0.106 INCHES MINIMUM AND |
| 0.116 INCHES MAXIMUM SECOND HOLE |
SPECIAL FEATURES | DRILLED HOLES IN SHANK SHALL BE PERPENDICULAR |