| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.500 INCHES |
| THREAD QUANTITY PER INCH | 20 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.768 INCHES MINIMUM |
| FASTENER LENGTH | 3.788 INCHES NOMINAL |
| MATERIAL | STEEL COMP 4140 OR |
| STEEL COMP 4340 OR |
| STEEL COMP 8740 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS6382 ASSN STD 1ST MATERIAL RESPONSE OR |
| AMS6415 ASSN STD 2ND MATERIAL RESPONSE OR |
| AMS6322 ASSN STD 3RD MATERIAL RESPONSE OR |
| AMS6325 ASSN STD 3RD MATERIAL RESPONSE OR |
| AMS6327 ASSN STD 3RD MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM AND |
| CHROMATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS-QQ-P-416, TYPE II, CLASS 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| MINIMUM TENSILE STRENGTH | 180000 POUNDS PER SQUARE INCH |
| HEAD STYLE | DOUBLE HEXAGON W/HOLE |
| HEAD HEIGHT | 0.504 INCHES NOMINAL |
| WIDTH BETWEEN FLATS | 0.5625 INCHES NOMINAL |
| EXTENDED WASHER DIAMETER | 0.818 INCHES MINIMUM AND |
| 0.828 INCHES MAXIMUM |
| EXTENDED WASHER THICKNESS | 0.123 INCHES NOMINAL |
| HOLE CONFIGURATION STYLE | DOUBLE HEXAGON LONGITUDINAL HOLE |
| HOLE TYPE | DRILLED |
| HOLE QUANTITY | 4 |
| HOLE DIAMETER | 0.055 INCHES NOMINAL |
| GRIP LENGTH | 3.000 INCHES NOMINAL |
| GRIP DIAMETER | 0.4985 INCHES MINIMUM AND |
| 0.4995 INCHES MAXIMUM |
| SPECIFICATION/STANDARD DATA | 80205-NASM21250 NATIONAL STD/SPEC |