| DISTANCE FROM LARGEST DIAMETER OF BEARING SURFACE OF HEAD TO RIBS | 0.060 INCHES NOMINAL |
| FASTENER LENGTH | 1.595 INCHES MINIMUM AND 1.625 INCHES MAXIMUM |
| FEATURES PROVIDED | CASEHARDENED |
| HARDNESS RATING | 52.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD DIAMETER | 1.120 INCHES NOMINAL |
| HEAD HEIGHT | 0.200 INCHES NOMINAL |
| HEAD STYLE | FLAT CHAMFER |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAE ASSN STD ALL MATERIAL RESPONSES OVERALL |
| MATERIAL | STEEL COMP 1022 OR STEEL COMP 1026 OR STEEL COMP 1030 OVERALL |
| NOMINAL THREAD DIAMETER | 0.438 INCHES |
| RIB LENGTH | 0.541 INCHES MINIMUM AND 0.551 INCHES MAXIMUM |
| RIB MAJOR DIAMETER | 0.612 INCHES MINIMUM AND 0.622 INCHES MAXIMUM |
| RIB MINOR DIAMETER | 0.589 INCHES MINIMUM AND 0.593 INCHES MAXIMUM |
| RIB QUANTITY | 39 |
| SHOULDER DIAMETER | 0.589 INCHES MINIMUM FIRST SHOULDER |
| SHOULDER SHAPE | ROUND FIRST SHOULDER |
| SHOULDER LENGTH | 0.541 INCHES MINIMUM AND 0.551 INCHES MAXIMUM FIRST SHOULDER |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-P-16232,TY M,CL 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PHOSPHATE MANGANESE OVERALL |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.978 INCHES MINIMUM AND 1.018 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 20 |
| THREAD SERIES DESIGNATOR | UNF |