| FASTENER LENGTH | 1.500 INCHES NOMINAL |
| HARDNESS RATING | 28.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD HEIGHT | 0.190 INCHES NOMINAL |
| HEAD STYLE | HEXAGON |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-624 FED SPEC ALL MATERIAL RESPONSES OVERALL |
| MATERIAL | STEEL COMP 8645 OR STEEL COMP 8740 OR STEEL COMP 4140 OVERALL |
| NOMINAL THREAD DIAMETER | 0.312 INCHES |
| POINT CHAMFER ANGLE | 60.0 DEGREES NOMINAL |
| POINT DIAMETER | 0.240 INCHES MINIMUM AND 0.245 INCHES MAXIMUM |
| POINT LENGTH | 0.750 INCHES NOMINAL |
| POINT STYLE | FLAT |
| WIDTH BETWEEN FLATS | 0.490 INCHES MINIMUM AND 0.502 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 1,CL 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD CLASS | 3A |
| THREAD LENGTH | 0.750 INCHES MINIMUM |
| THREAD QUANTITY PER INCH | 24 |
| THREAD SERIES DESIGNATOR | UNF |