| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 2.375 INCHES NOMINAL FIRST HOLE |
| CONCENTRIC HOLE DIAMETER | 0.374 INCHES MINIMUM AND 0.381 INCHES MAXIMUM |
| COUNTERBORE DEPTH | 1.843 INCHES MINIMUM AND 1.875 INCHES MAXIMUM |
| COUNTERBORE DIAMETER | 0.499 INCHES MINIMUM AND 0.506 INCHES MAXIMUM |
| FASTENER LENGTH | 2.375 INCHES NOMINAL |
| HARDNESS RATING | 39.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD DIAMETER | 1.375 INCHES NOMINAL |
| HEAD HEIGHT | 0.250 INCHES NOMINAL |
| HEAD STYLE | FLAT CHAMFER |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5000 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 4340 OVERALL |
| MINIMUM TENSILE STRENGTH | 180000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.750 INCHES |
| SHANK UNTHREADED HOLE DIAMETER | 0.139 INCHES MINIMUM AND 0.145 INCHES MAXIMUM FIRST HOLE |
| SHOULDER DIAMETER | 0.8719 INCHES MINIMUM AND 0.8727 INCHES MAXIMUM |
| SHOULDER LENGTH | 1.720 INCHES MINIMUM AND 1.730 INCHES MAXIMUM |
| SPECIAL FEATURES | PERIPHERY OF HEAD FLATTED TO FOUR SIDES 1.240 IN. MIN 1.253 IN. MAX SQUARE |
| STYLE DESIGNATOR | COUNTERBORE UNTHREADED |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.520 INCHES MINIMUM |
| THREAD QUANTITY PER INCH | 16 |
| THREAD SERIES DESIGNATOR | UNF |