| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 4.312 INCHES NOMINAL FIRST HOLE |
| CONCENTRIC HOLE DEPTH | 3.670 INCHES MINIMUM AND 3.685 INCHES MAXIMUM |
| CONCENTRIC HOLE DIAMETER | 0.483 INCHES MINIMUM AND 0.490 INCHES MAXIMUM |
| FASTENER LENGTH | 4.451 INCHES MINIMUM AND 4.466 INCHES MAXIMUM |
| HEAD DIAMETER | 0.766 INCHES NOMINAL |
| HEAD HEIGHT | 0.065 INCHES MINIMUM AND 0.080 INCHES MAXIMUM |
| HEAD STYLE | ROUND W/WRENCH FLATS |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 630 OVERALL |
| MINIMUM TENSILE STRENGTH | 135000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |
| SHANK UNTHREADED HOLE DIAMETER | 0.076 INCHES MINIMUM AND 0.086 INCHES MAXIMUM FIRST HOLE |
| WIDTH BETWEEN FLATS | 0.688 INCHES NOMINAL |
| STYLE DESIGNATOR | CONCENTRIC HOLE UNTHREADED |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.358 INCHES MINIMUM AND 0.403 INCHES MAXIMUM |
| THREAD SERIES DESIGNATOR | UNF |
| THREAD QUANTITY PER INCH | 28 |