| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 1.25 INCHES |
| THREAD QUANTITY PER INCH | 12 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 1.60 INCHES NOMINAL |
| FASTENER LENGTH | 4.110 INCHES MINIMUM AND |
| 4.140 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 4140 AND |
| STEEL COMP 4340 AND |
| STEEL COMP 8740 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAE-AMS6382 NATIONAL STD/SPEC 1ST MATERIAL RESPONSE AND |
| SAE-AMS6415 OR SAE-AMS6484 NATIONAL STD/SPEC 2ND MATERIAL RESPONSE AND |
| SAE-AMS6325 OR SAE-AMS6327 NATIONAL STD/SPEC 3RD MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | SAE-AMS-QQ-P-416 NATIONAL STD/SPEC SINGLE TREATMENT RESPONSE OVERALL |
| HEAD STYLE | BEVEL-CONICAL |
| HEAD DIAMETER | 2.115 INCHES MINIMUM AND |
| 2.125 INCHES MAXIMUM |
| HEAD HEIGHT | 1.250 INCHES NOMINAL |
| INTERNAL DRIVE STYLE | HEXAGON |
| WIDTH ACROSS FLATS | 1.001 INCHES MINIMUM AND |
| 1.005 INCHES MAXIMUM |
| SPECIFICATION/STANDARD DATA | 80205-NASM20020 NATIONAL STD/SPEC |