| FASTENER LENGTH | 1.630 INCHES NOMINAL |
| HARDNESS RATING | 40.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD HEIGHT | 0.230 INCHES MINIMUM AND 0.270 INCHES MAXIMUM |
| HEAD STYLE | HEXAGON |
| INTERNAL DRIVE STYLE | W/O INTERNAL DRIVE |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-6758,COND F4 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 4130 OVERALL |
| NOMINAL THREAD DIAMETER | 0.312 INCHES |
| POINT STYLE | BALL |
| POINT DIAMETER | 0.257 INCHES MINIMUM AND 0.267 INCHES MAXIMUM |
| POINT LENGTH | 0.166 INCHES MINIMUM AND 0.186 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.493 INCHES MINIMUM AND 0.507 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 1.444 INCHES MINIMUM AND 1.464 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 24 |
| THREAD SERIES DESIGNATOR | UNF |