THREAD SERIES DESIGNATOR | UNC |
NOMINAL THREAD DIAMETER | 0.312 INCHES |
THREAD QUANTITY PER INCH | 18 |
THREAD CLASS | 2A |
THREAD DIRECTION | RIGHT-HAND |
THREAD LENGTH | 0.500 INCHES MAXIMUM |
FASTENER LENGTH | 0.469 INCHES MINIMUM AND |
| 0.500 INCHES MAXIMUM |
MATERIAL DOCUMENT AND CLASSIFICATION | 66 FED STD ALL MATERIAL RESPONSES OVERALL |
SURFACE TREATMENT | CADMIUM AND |
| CHROMATE OVERALL |
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TYPE 2 CLASS 3 FED SPEC ALL TREATMENT RESPONSES OVERALL |
HARDNESS RATING | 30.0 ROCKWELL C MINIMUM AND |
| 37.0 ROCKWELL C MAXIMUM OVERALL |
HEAD STYLE | SQUARE |
HEAD HEIGHT | 0.224 INCHES MINIMUM AND |
| 0.245 INCHES MAXIMUM |
WIDTH BETWEEN FLATS | 0.302 INCHES MINIMUM AND |
| 0.312 INCHES MAXIMUM |
INTERNAL DRIVE STYLE | W/O INTERNAL DRIVE |
POINT STYLE | CUP |
SPEC/STD CONTROLLING DATA | |
MANUFACTURERS CODE | 96906 |
DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | MS51955-17 |