| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.945 INCHES MINIMUM AND 1.970 INCHES MAXIMUM FIRST HOLE |
| CONCENTRIC HOLE DIAMETER | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM |
| FASTENER LENGTH | 2.125 INCHES NOMINAL |
| HEAD DIAMETER | 0.990 INCHES MINIMUM AND 1.110 INCHES MAXIMUM |
| HEAD HEIGHT | 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM |
| HEAD STYLE | ROUND W/WRENCH FLATS |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5000 COND D4 MIL SPEC ALL MATERIAL RESPONSES OVERALL |
| MATERIAL | STEEL COMP 4340 OR STEEL COMP E4340 OVERALL |
| MINIMUM TENSILE STRENGTH | 180000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.500 INCHES |
| SHANK UNTHREADED HOLE DIAMETER | 0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM FIRST HOLE |
| SHOULDER DIAMETER | 0.624 INCHES MINIMUM AND 0.625 INCHES MAXIMUM |
| SHOULDER LENGTH | 1.755 INCHES MINIMUM AND 1.800 INCHES MAXIMUM |
| SPECIAL FEATURES | ZINC CHROMATE COATING IN CONCENTRIC HOLE |
| WIDTH BETWEEN FLATS | 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM |
| STYLE DESIGNATOR | COUNTERBORE UNTHREADED |
| SURFACE TREATMENT | CADMIUM OR CHROMIUM THREADS |
| SURFACE TREATMENT | CADMIUM OR CHROMIUM GRIP |
| SURFACE TREATMENT | CADMIUM OR CHROMIUM HEAD |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.370 INCHES MINIMUM |
| THREAD QUANTITY PER INCH | 20 |
| THREAD SERIES DESIGNATOR | UNF |