| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.875 INCHES |
| THREAD QUANTITY PER INCH | 14 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 1.254 INCHES MINIMUM AND |
| 1.274 INCHES MAXIMUM |
| FASTENER LENGTH | 4.014 INCHES NOMINAL |
| MATERIAL | STEEL COMP 4140 OR |
| STEEL COMP E4340 OR |
| STEEL COMP 8740 OR |
| STEEL COMP 6150 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-8503 MIL SPEC 4TH MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM AND |
| CHROMATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 39.0 ROCKWELL C MINIMUM AND |
| 43.0 ROCKWELL C MAXIMUM OVERALL |
| MINIMUM TENSILE STRENGTH | 180000 POUNDS PER SQUARE INCH |
| STYLE DESIGNATOR | CONCENTRIC HOLE UNTHREADED |
| CONCENTRIC HOLE DEPTH | 0.260 INCHES MAXIMUM |
| CONCENTRIC HOLE DIAMETER | 0.187 INCHES MAXIMUM |
| HEAD STYLE | DOUBLE HEXAGON W/HOLE |
| HEAD HEIGHT | 0.808 INCHES NOMINAL |
| WIDTH BETWEEN FLATS | 0.9375 INCHES NOMINAL |
| EXTENDED WASHER DIAMETER | 1.428 INCHES MINIMUM AND |
| 1.438 INCHES MAXIMUM |
| EXTENDED WASHER THICKNESS | 0.198 INCHES NOMINAL |
| FEATURES PROVIDED | CASEHARDENED |
| SPECIAL FEATURES | SURFACE FINISH ON SHANK AND BEARING SURFACE OF HEAD 32.0 MICROINCHES |
| SPEC/STD CONTROLLING DATA | |
| MANUFACTURERS CODE | 96906 |
| DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | MS21250-14044 |