| FASTENER LENGTH | 1.000 INCHES NOMINAL |
| HEAD STYLE | FILLISTER |
| HEAD DIAMETER | 0.490 INCHES MINIMUM AND 0.518 INCHES MAXIMUM |
| HEAD HEIGHT | 0.194 INCHES MINIMUM AND 0.211 INCHES MAXIMUM |
| INTERNAL DRIVE STYLE | SLOT |
| NOMINAL THREAD DIAMETER | 0.312 INCHES |
| SCREW 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 |
| SCREW MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-633 FED SPEC ALL MATERIAL RESPONSES |
| SCREW SURFACE TREATMENT | CADMIUM OR ZINC |
| NONDEFINITIVE SPEC/STD DATA | I TYPE AND 4S STYLE |