THREAD SERIES DESIGNATOR | UNF |
NOMINAL THREAD DIAMETER | 0.312 INCHES |
THREAD QUANTITY PER INCH | 24 |
THREAD CLASS | 3A |
THREAD DIRECTION | RIGHT-HAND |
THREAD LENGTH | 0.220 INCHES MINIMUM AND |
| 0.248 INCHES MAXIMUM |
FASTENER LENGTH | 0.302 INCHES MINIMUM AND |
| 0.322 INCHES MAXIMUM |
MATERIAL | STEEL COMP 4037 OR |
| STEEL COMP 4137 OR |
| STEEL COMP 4140 OR |
| STEEL COMP 8630 OR |
| STEEL COMP 8740 OVERALL |
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 | 45.0 ROCKWELL C MINIMUM AND |
| 53.0 ROCKWELL C MAXIMUM OVERALL |
HEAD STYLE | HEADLESS (SETSCREW) |
INTERNAL DRIVE STYLE | HEXAGON |
WIDTH ACROSS FLATS | 0.156 INCHES NOMINAL |
POINT STYLE | HALF DOG |
NONDEFINITIVE SPEC/STD DATA | 1 TYPE AND |
| 6 STYLE |
SPEC/STD CONTROLLING DATA | |
MANUFACTURERS CODE | 81348 |
NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | F-F-S-200 |