| DISTANCE FROM CENTERLINE TO FLAT | 0.135 INCHES MINIMUM AND 0.145 INCHES MAXIMUM |
| FASTENER LENGTH | 0.930 INCHES MINIMUM AND 0.950 INCHES MAXIMUM |
| HARDNESS RATING | 30.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD HEIGHT | 0.180 INCHES MINIMUM AND 0.200 INCHES MAXIMUM |
| HEAD DIAMETER | 0.590 INCHES MINIMUM AND 0.610 INCHES MAXIMUM |
| HEAD STYLE | DEE CHAMFER |
| INTERNAL DRIVE STYLE | W/O INTERNAL DRIVE |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 7470 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5616 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL CORROSION RESISTING OVERALL |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD CLASS | 1A |
| THREAD SERIES DESIGNATOR | UNF |
| THREAD QUANTITY PER INCH | 28 |
| DISTANCE FROM CENTER OF HEAD TO CENTER OF SHANK | 0.180 INCHES MINIMUM AND 0.190 INCHES MAXIMUM |