| CHAMFER ANGLE | 30.0 DEGREES MINIMUM AND 45.0 DEGREES MAXIMUM |
| FASTENER LENGTH | 1.0 INCHES NOMINAL |
| HEAD DIAMETER | 0.457 INCHES MINIMUM AND 0.469 INCHES MAXIMUM |
| HEAD HEIGHT | 0.306 INCHES MINIMUM AND 0.312 INCHES MAXIMUM |
| HEAD STYLE | FLAT CHAMFER |
| INTERNAL DRIVE STYLE | HEXAGON |
| LOCKING FEATURE | PELLET THREADS |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW CAP SOCKET HEAD |
| MATERIAL DOCUMENT AND CLASSIFICATION | SPEC FF-S-86 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL CORROSION RESISTING OVERALL |
| NOMINAL THREAD DIAMETER | 0.3125 INCHES |
| SPECIFICATION/STANDARD DATA | NAS1351 NATIONAL STD/SPEC |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 2411 NATIONAL STD SINGLE TREATMENT RESPONSE OVERALL |
| SPECIAL FEATURES | SILVER FLASH FINISH |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 1.125 INCHES NOMINAL |
| THREAD QUANTITY PER INCH | 24 |
| THREAD SERIES DESIGNATOR | UNRF |
| WIDTH ACROSS FLATS | 0.25 INCHES NOMINAL |