| THREAD SERIES DESIGNATOR | UNF |
| NOMINAL THREAD DIAMETER | 0.375 INCHES |
| THREAD QUANTITY PER INCH | 24 |
| NONSTANDARD THREAD PITCH DIAMETER | -0.3420 TO 0.3449 INCHES |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.705 INCHES MINIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5628 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| HARDNESS RATING | 26.0 ROCKWELL C MINIMUM AND |
| 32.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD HEIGHT | 0.219 INCHES NOMINAL |
| WIDTH BETWEEN FLATS | 0.553 INCHES MINIMUM AND |
| 0.562 INCHES MAXIMUM |
| SHOULDER SHAPE | ROUND FIRST SHOULDER |
| SHOULDER DIAMETER | 0.400 INCHES MINIMUM AND |
| 0.406 INCHES MAXIMUM FIRST SHOULDER |
| SHOULDER LENGTH | 1.095 INCHES NOMINAL FIRST SHOULDER |
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.540 INCHES MINIMUM AND |
| 1.660 INCHES MAXIMUM FIRST HOLE |
| SHANK UNTHREADED HOLE DIAMETER | 0.097 INCHES NOMINAL FIRST HOLE |
| 0.097 INCHES NOMINAL SECOND HOLE |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |