| COUNTERSINK ANGLE | 82.0 DEGREES NOMINAL |
| FASTENER LENGTH | 0.375 INCHES NOMINAL |
| HEAD DIAMETER | 0.311 INCHES MINIMUM AND 0.359 INCHES MAXIMUM |
| HEAD HEIGHT | 0.112 INCHES NOMINAL |
| HEAD STYLE | FLAT COUNTERSUNK UNDERCUT |
| INTERNAL DRIVE STYLE | HEXAGON |
| MATERIAL DOCUMENT AND CLASSIFICATION | FED-STD-66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL CORROSION RESISTING OVERALL |
| MINIMUM TENSILE STRENGTH | 1120 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.164 INCHES |
| SPECIAL FEATURES | OXIDE IS BLACK |
| WIDTH ACROSS FLATS | 0.094 INCHES NOMINAL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC 1ST TREATMENT RESPONSE AND MIL-C-13924,CLASS 4 MIL SPEC 2ND TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE AND OXIDE OVERALL |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 32 |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) |
| THREAD PITCH IN MILLIMETERS | 0.79 |