| THREAD DIRECTION | RIGHT-HAND |
| FASTENER LENGTH | 1.250 INCHES NOMINAL |
| MATERIAL | STEEL OVERALL |
| THREAD LENGTH | 1.250 INCHES NOMINAL |
| HEAD STYLE | HEXAGON |
| THREAD SERIES DESIGNATOR | UNC |
| NOMINAL THREAD DIAMETER | 0.312 INCHES |
| THREAD QUANTITY PER INCH | 18 |
| THREAD CLASS | 2A |
| MATERIAL DOCUMENT AND CLASSIFICATION | GRADE 8 CARBON STEEL IAW SAE J429 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | CHROMATE ZINC OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | TYPE 5CT PER ASTM F1941 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 33.0 ROCKWELL C NOMINAL OVERALL |
| MINIMUM TENSILE STRENGTH | 150000 POUNDS PER SQUARE INCH |
| HEAD HEIGHT | 0.195 INCHES MINIMUM AND |
| 0.235 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.484 INCHES MINIMUM AND |
| 0.500 INCHES MAXIMUM |
| SPECIAL FEATURES | SCHEDULE B 731815.9000; DFARS SPECIALTY METALS COMPLIANT (252.225-7009) |