| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.375 INCHES |
| THREAD QUANTITY PER INCH | 24 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.343 INCHES MINIMUM AND |
| 0.390 INCHES MAXIMUM |
| FASTENER LENGTH | 1.281 INCHES MINIMUM AND |
| 1.328 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 4140 AND |
| STEEL COMP E4340 AND |
| STEEL COMP 8740 AND |
| STEEL COMP 8735 AND |
| STEEL COMP 6150 AND |
| STEEL COMP 4037 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE AND |
| MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE AND |
| MIL-S-6049 MIL SPEC 3RD MATERIAL RESPONSE AND |
| MIL-S-6098 MIL SPEC 4TH MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416, TY2CL2 FED SPEC ALL TREATMENT RESPONSES 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 | 10500 POUNDS PER SQUARE INCH |
| HEAD STYLE | HEXAGON |
| HEAD HEIGHT | 0.102 INCHES MINIMUM AND |
| 0.134 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.552 INCHES MINIMUM AND |
| 0.564 INCHES MAXIMUM |
| GRIP LENGTH | 0.938 INCHES NOMINAL |
| GRIP DIAMETER | 0.373 INCHES MINIMUM AND |
| 0.374 INCHES MAXIMUM |
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.149 INCHES NOMINAL OVERALL |
| SHANK UNTHREADED HOLE DIAMETER | 0.106 INCHES MINIMUM AND |
| 0.116 INCHES MAXIMUM OVERALL |
| SPECIAL FEATURES | ADDITIONAL MDCL ARE MIL-S-8503 AND MIL-S-8695 |