| COUNTERSINK ANGLE | 80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM |
| FASTENER LENGTH | 3.906 INCHES MINIMUM AND 4.000 INCHES MAXIMUM |
| HEAD DIAMETER | 0.582 INCHES MINIMUM AND 0.650 INCHES MAXIMUM |
| HEAD STYLE | FLAT COUNTERSUNK |
| NONDEFINITIVE SPEC/STD DATA | 1 TYPE AND 2S STYLE |
| NONMACHINE NOMINAL THREAD DIAMETER | 0.320 INCHES |
| INTERNAL DRIVE STYLE | SLOT |
| MATERIAL | STEEL OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 1,CL 3 FED SPEC 1ST TREATMENT RESPONSE OVERALL OR QQ-Z-325,TY 1,CL 2 FED SPEC 2ND TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL OR ZINC OVERALL |