| CONCENTRIC HOLE DEPTH | 1.687 INCHES MINIMUM AND 1.712 INCHES MAXIMUM |
| CONCENTRIC HOLE DIAMETER | 0.107 INCHES MINIMUM AND 0.114 INCHES MAXIMUM |
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 2.234 INCHES MINIMUM AND 2.244 INCHES MAXIMUM THREADS |
| FASTENER LENGTH | 2.494 INCHES MINIMUM AND 2.524 INCHES MAXIMUM |
| HEAD HEIGHT | 0.375 INCHES MINIMUM AND 0.390 INCHES MAXIMUM |
| HEAD STYLE | HEXAGON |
| INTERNAL THREAD CLASS | 3B HEAD |
| INTERNAL THREAD DIRECTION | RIGHT-HAND HEAD |
| INTERNAL THREAD LENGTH | 0.250 INCHES NOMINAL HEAD |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | NICKEL ALLOY 718 OVERALL |
| NOMINAL THREAD DIAMETER | 0.500 INCHES |
| NOMINAL THREAD SIZE | 0.250 INCHES HEAD |
| SHANK UNTHREADED HOLE DIAMETER | 0.107 INCHES MINIMUM AND 0.114 INCHES MAXIMUM THREADS |
| SHOULDER LENGTH | 1.712 INCHES MINIMUM AND 1.722 INCHES MAXIMUM |
| SHOULDER DIAMETER | 0.7477 INCHES MINIMUM AND 0.7487 INCHES MAXIMUM |
| STYLE DESIGNATOR | COUNTERBORE THREADED |
| SPECIAL FEATURES | SECOND HOLD IN THDS, 90 DEGREES APART; 32 MICRO-INCH FINISH ON SHOULDER AND THRD RELIEF |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.630 INCHES MINIMUM AND 0.665 INCHES MAXIMUM |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) |
| THREAD SERIES | UNF HEAD |
| THREAD QUANTITY PER INCH | 20 |
| THREADS PER INCH | 28 HEAD |
| WIDTH BETWEEN FLATS | 1.052 INCHES MINIMUM AND 1.064 INCHES MAXIMUM |