THREAD SERIES DESIGNATOR | UNF |
NOMINAL THREAD DIAMETER | 0.438 INCHES |
THREAD QUANTITY PER INCH | 20 |
THREAD CLASS | 3A |
THREAD DIRECTION | RIGHT-HAND |
THREAD LENGTH | 0.406 INCHES MINIMUM AND |
| 0.453 INCHES MAXIMUM |
FASTENER LENGTH | 1.031 INCHES MINIMUM AND |
| 1.078 INCHES MAXIMUM |
MATERIAL | STEEL COMP 4140 OR |
| STEEL COMP E4340 OR |
| STEEL COMP 8740 OR |
| STEEL COMP 8735 OR |
| STEEL COMP 6150 OR |
| STEEL COMP 4037 OVERALL |
MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR |
| MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OR |
| MIL-S-6049 MIL SPEC 3RD MATERIAL RESPONSE OR |
| MIL-S-6098 MIL SPEC 4TH MATERIAL RESPONSE OR |
| MIL-S-8503 MIL SPEC 5TH MATERIAL RESPONSE OR |
| MIL-S-8695 MIL SPEC 6TH MATERIAL RESPONSE OVERALL |
SURFACE TREATMENT | CADMIUM AND |
| CHROMATE OVERALL |
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND |
| 40.0 ROCKWELL C MAXIMUM OVERALL |
MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
SINGLE SHEAR STRENGTH | 14300 POUNDS PER SQUARE INCH |
HEAD STYLE | HEXAGON |
HEAD HEIGHT | 0.219 INCHES NOMINAL |
WIDTH BETWEEN FLATS | 0.615 INCHES MINIMUM AND |
| 0.627 INCHES MAXIMUM |
GRIP LENGTH | 0.625 INCHES NOMINAL |
GRIP DIAMETER | 0.4358 INCHES MINIMUM AND |
| 0.4367 INCHES MAXIMUM |
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 0.844 INCHES NOMINAL FIRST HOLE |
SHANK UNTHREADED HOLE DIAMETER | 0.106 INCHES NOMINAL FIRST HOLE |