| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.625 INCHES |
| THREAD QUANTITY PER INCH | 18 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.941 INCHES NOMINAL |
| FASTENER LENGTH | 4.374 INCHES MINIMUM AND |
| 4.404 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 4037 OR |
| STEEL COMP 4130 OR |
| STEEL COMP 4140 OR |
| STEEL COMP 8630 OR |
| STEEL COMP 8735 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 6300 ASSN STD 1ST MATERIAL RESPONSE OR |
| MIL-S-6758 MIL SPEC 2ND MATERIAL RESPONSE OR |
| MIL-S-5656 MIL SPEC 3RD MATERIAL RESPONSE OR |
| MIL-S-6050 MIL SPEC 4TH MATERIAL RESPONSE OR |
| MIL-S-6098 MIL SPEC 5TH MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM AND |
| CHROMATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416, TYPE 2, XLASS 2 FED SPEC ALL TREATMENT RESPONSES OVERALL |
| MINIMUM TENSILE STRENGTH | 125000 POUNDS PER SQUARE INCH |
| HEAD STYLE | HEXAGON |
| HEAD HEIGHT | 0.390 INCHES MINIMUM AND |
| 0.422 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 1.053 INCHES MINIMUM AND |
| 1.066 INCHES MAXIMUM |
| SHOULDER SHAPE | ROUND FIRST SHOULDER |
| SHOULDER DIAMETER | 0.744 INCHES MINIMUM AND |
| 0.749 INCHES MAXIMUM FIRST SHOULDER |
| SHOULDER LENGTH | 3.438 INCHES MINIMUM AND |
| 3.458 INCHES MAXIMUM FIRST SHOULDER |
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 3.366 INCHES NOMINAL THREADS |
| SHANK UNTHREADED HOLE DIAMETER | 0.141 INCHES MINIMUM AND |
| 0.151 INCHES MAXIMUM THREADS |
| SPECIFICATION/STANDARD DATA | 80205-NAS1297 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |