| CONCENTRIC HOLE DIAMETER | 0.160 INCHES NOMINAL |
| COUNTERBORE DIAMETER | 0.380 INCHES NOMINAL |
| COUNTERBORE DEPTH | 2.500 INCHES NOMINAL |
| DISTANCE FROM CENTERLINE TO FLAT | 0.375 INCHES MINIMUM AND 0.380 INCHES MAXIMUM |
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 2.810 INCHES NOMINAL FIRST HOLE |
| FASTENER LENGTH | 2.940 INCHES NOMINAL |
| HARDNESS RATING | 34.0 ROCKWELL C MINIMUM AND 37.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD HEIGHT | 0.120 INCHES NOMINAL |
| HEAD DIAMETER | 1.000 INCHES NOMINAL |
| HEAD STYLE | DEE |
| MATERIAL DOCUMENT AND CLASSIFICATION | 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 4140 OVERALL |
| NOMINAL THREAD DIAMETER | 0.500 INCHES |
| SHANK UNTHREADED HOLE DIAMETER | 0.106 INCHES NOMINAL FIRST HOLE |
| SHOULDER DIAMETER | 0.623 INCHES MINIMUM AND 0.624 INCHES MAXIMUM |
| SHOULDER LENGTH | 2.515 INCHES MINIMUM AND 2.520 INCHES MAXIMUM |
| STYLE DESIGNATOR | COUNTERBORE UNTHREADED |
| SURFACE TREATMENT | CADMIUM HEAD |
| SURFACE TREATMENT | CADMIUM THREADS |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD CLASS | 3A |
| THREAD LENGTH | 0.330 INCHES MINIMUM AND 0.335 INCHES MAXIMUM |
| THREAD SERIES DESIGNATOR | UNF |
| THREAD QUANTITY PER INCH | 20 |