| FASTENER LENGTH | 0.500 INCHES NOMINAL |
| HEAD HEIGHT | 0.107 INCHES MINIMUM AND 0.120 INCHES MAXIMUM |
| HEAD DIAMETER | 0.287 INCHES MINIMUM AND 0.309 INCHES MAXIMUM |
| HEAD STYLE | ROUND |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-633 FED SPEC ALL MATERIAL RESPONSES OVERALL |
| MATERIAL | STEEL COMP 1010 OR STEEL COMP 1011 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OVERALL |
| NONDEFINITIVE SPEC/STD DATA | U TYPE AND 1P STYLE |
| NONMACHINE NOMINAL THREAD DIAMETER | 0.164 INCHES |
| NONMACHINE THREAD STYLE | DRIVE SCREW (TYPE U) |
| PILOT LENGTH | 0.062 INCHES NOMINAL |
| PILOT DIAMETER | 0.132 INCHES MINIMUM AND 0.136 INCHES MAXIMUM |
| SURFACE TREATMENT | CADMIUM OR ZINC OVERALL |