| EFFECTIVE LENGTH | 0.375 INCHES MINIMUM AND 0.380 INCHES MAXIMUM |
| FIRST END STYLE | SQUARE |
| HARDNESS RATING | 45.0 ROCKWELL C MINIMUM AND 49.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD STYLE | FLAT FILLISTER |
| HEIGHT | 0.250 INCHES NOMINAL |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 8640 OVERALL |
| PIN HEAD DIAMETER | 0.4990 INCHES MINIMUM AND 0.4995 INCHES MAXIMUM |
| STYLE DESIGNATOR | GROOVE |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-16232 TY 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PHOSPHATE MANGANESE OVERALL |
| UNDER HEAD LENGTH | 0.500 INCHES NOMINAL |
| UNDERCUT DIAMETER | 0.472 INCHES MINIMUM AND 0.476 INCHES MAXIMUM |
| UNDERCUT WIDTH | 0.028 INCHES MINIMUM AND 0.031 INCHES MAXIMUM |