| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.625 INCHES |
| THREAD QUANTITY PER INCH | 18 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.873 INCHES NOMINAL |
| FASTENER LENGTH | 4.358 INCHES MINIMUM AND |
| 4.388 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 4140 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 6382,6415,6484, OR 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | NAS672 ASSN STD 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 |
| HEAD STYLE | DOUBLE HEXAGON W/HOLE |
| HEAD HEIGHT | 0.608 INCHES MINIMUM AND |
| 0.628 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.682 INCHES MINIMUM AND |
| 0.691 INCHES MAXIMUM |
| EXTENDED WASHER DIAMETER | 1.040 INCHES MINIMUM AND |
| 1.050 INCHES MAXIMUM |
| EXTENDED WASHER THICKNESS | 0.140 INCHES MINIMUM AND |
| 0.160 INCHES MAXIMUM |
| HOLE CONFIGURATION STYLE | DOUBLE HEXAGON LONGITUDINAL HOLE |
| HOLE TYPE | DRILLED |
| HOLE QUANTITY | 4 |
| HOLE DIAMETER | 0.050 INCHES MINIMUM AND |
| 0.060 INCHES MAXIMUM |
| GRIP LENGTH | 3.490 INCHES MINIMUM AND |
| 3.510 INCHES MAXIMUM |
| GRIP DIAMETER | 0.6230 INCHES MINIMUM AND |
| 0.6240 INCHES MAXIMUM |
| SPECIFICATION/STANDARD DATA | 80205-NAS624 THRU NAS644 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | BOLT,TENSION,ALLOY STEEL,TWELVE POINT,EXTERNAL WRENCHING,180 KSI FTU |