| FASTENER LENGTH | 3.847 INCHES MINIMUM AND 3.867 INCHES MAXIMUM |
| GROOVE DIAMETER | 0.190 INCHES MINIMUM AND 0.200 INCHES MAXIMUM |
| HEAD DIAMETER | 0.380 INCHES MINIMUM AND 0.400 INCHES MAXIMUM |
| HEAD HEIGHT | 0.092 INCHES MINIMUM AND 0.132 INCHES MAXIMUM |
| INTERNAL DRIVE STYLE | SLOT |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 4130 OVERALL |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 1,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.290 INCHES MINIMUM AND 0.330 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 28 |
| THREAD SERIES DESIGNATOR | UNF |