| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.750 INCHES |
| THREAD QUANTITY PER INCH | 16 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 1.016 INCHES MINIMUM AND |
| 1.066 INCHES MAXIMUM |
| FASTENER LENGTH | 3.776 INCHES MINIMUM AND |
| 3.806 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 1330 OR |
| STEEL COMP 4130 PRIMARY WASHER |
| STEEL COMP E4340 OR |
| STEEL COMP 4140 OR |
| STEEL COMP 6150 OR |
| STEEL COMP 8735 OR |
| STEEL COMP 8740 FASTENER |
| MATERIAL DOCUMENT AND CLASSIFICATION | FED 66 FED STD ALL MATERIAL RESPONSES PRIMARY WASHER |
| SURFACE TREATMENT | CADMIUM AND |
| CHROMATE FASTENER |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE FASTENER |
| HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND |
| 40.0 ROCKWELL C MAXIMUM FASTENER |
| MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
| HEAD STYLE | DISHED HEXAGON |
| HEAD HEIGHT | 0.375 INCHES MINIMUM AND |
| 0.390 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 1.052 INCHES MINIMUM AND |
| 1.064 INCHES MAXIMUM |
| WASHER QUANTITY | 1 |
| PRIMARY WASHER STYLE | FLAT |
| PRIMARY WASHER OUTSIDE DIAMETER | 1.250 INCHES NOMINAL |
| PRIMARY WASHER MATERIAL THICKNESS | 0.062 INCHES NOMINAL |
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 3.514 INCHES MINIMUM AND |
| 3.564 INCHES MAXIMUM FIRST HOLE |
| SHANK UNTHREADED HOLE DIAMETER | 0.141 INCHES MINIMUM AND |
| 0.151 INCHES MAXIMUM FIRST HOLE |
| FEATURES PROVIDED | SPACER |