| FASTENER LENGTH | 0.375 INCHES NOMINAL |
| HARDNESS RATING | 35.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD DIAMETER | 0.216 INCHES MINIMUM AND 0.226 INCHES MAXIMUM |
| HEAD HEIGHT | 0.134 INCHES MINIMUM AND 0.138 INCHES MAXIMUM |
| HEAD STYLE | FLAT FILLISTER |
| INTERNAL DRIVE STYLE | HEXAGON |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 410 OVERALL |
| NONMACHINE NOMINAL THREAD DIAMETER | 0.138 INCHES |
| NONMACHINE THREAD STYLE | BLUNT (TYPE TT) |
| WIDTH ACROSS FLATS | 0.109 INCHES MINIMUM AND 0.111 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | IFI-112 ASSN STD ALL TREATMENT RESPONSES OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |