| FASTENER LENGTH | 0.583 INCHES NOMINAL |
| GRIP LENGTH | 0.193 INCHES MAXIMUM |
| HEAD HEIGHT | 0.077 INCHES MINIMUM AND 0.087 INCHES MAXIMUM |
| HEAD MAJOR DIAMETER | 0.415 INCHES MINIMUM AND 0.440 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-6758 MIL SPEC 3RD MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP 4130 OVERALL |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| SHANK DIAMETER | 0.248 INCHES MINIMUM AND 0.249 INCHES MAXIMUM |
| SHANK STYLE | PIN-RIVET, STRAIGHT, THREADED |
| WIDTH BETWEEN FLATS | 0.094 INCHES MINIMUM AND 0.095 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TYPE 1 CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OR QQ-P-416 TYPE 2 FED SPEC 1ST TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OR CADMIUM AND CHROMATE OVERALL |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD CLASS | 3A |
| THREAD SERIES DESIGNATOR | UNF |
| THREAD QUANTITY PER INCH | 28 |