| COUNTERSINK ANGLE | 80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM |
| FASTENER LENGTH | 0.950 INCHES MINIMUM AND 1.000 INCHES MAXIMUM |
| HEAD DIAMETER | 0.452 INCHES MINIMUM AND 0.507 INCHES MAXIMUM |
| HEAD STYLE | FLAT COUNTERSUNK |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 |
| NONDEFINITIVE SPEC/STD DATA | SF TYPE OR SW TYPE OR TT TYPE |
| NONMACHINE NOMINAL THREAD DIAMETER | 0.250 INCHES |
| NONMACHINE THREAD STYLE | BLUNT (SF) OR BLUNT (TYPE SW) OR BLUNT (TYPE TT) |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM AND CHROMATE OVERALL |