| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.813 INCHES NOMINAL FIRST HOLE |
| FASTENER LENGTH | 3.675 INCHES MINIMUM AND 3.705 INCHES MAXIMUM |
| HEAD HEIGHT | 0.156 INCHES NOMINAL |
| HEAD STYLE | HEXAGON |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | IRON ALLOY 660 OVERALL |
| NOMINAL THREAD DIAMETER | 0.312 INCHES |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |
| SHANK UNTHREADED HOLE DIAMETER | 0.062 INCHES MINIMUM AND 0.065 INCHES MAXIMUM FIRST HOLE |
| SHOULDER DIAMETER | 0.625 INCHES NOMINAL FIRST SHOULDER |
| SHOULDER LENGTH | 2.845 INCHES MINIMUM AND 2.875 INCHES MAXIMUM FIRST SHOULDER |
| SHOULDER SHAPE | ROUND FIRST SHOULDER |
| WIDTH BETWEEN FLATS | 0.496 INCHES MINIMUM AND 0.504 INCHES MAXIMUM |
| THREAD CLASS | 1A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.830 INCHES NOMINAL |
| THREAD QUANTITY PER INCH | 24 |
| THREAD SERIES DESIGNATOR | UNF |