| DISTANCE FROM LARGEST DIAMETER OF BEARING SURFACE OF HEAD TO RIBS | 0.062 INCHES NOMINAL |
| FASTENER LENGTH | 1.500 INCHES MINIMUM AND 1.531 INCHES MAXIMUM |
| FEATURES PROVIDED | CASEHARDENED |
| HARDNESS RATING | 207.0 BRINELL STANDARD MINIMUM AND 248.0 BRINELL STANDARD MAXIMUM OVERALL |
| HEAD DIAMETER | 0.812 INCHES NOMINAL |
| HEAD HEIGHT | 0.229 INCHES MINIMUM AND 0.239 INCHES MAXIMUM |
| HEAD STYLE | PAN NO. 2 |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-634 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 1020 OVERALL |
| MINIMUM TENSILE STRENGTH | 110000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.500 INCHES |
| RIB LENGTH | 0.298 INCHES MINIMUM AND 0.303 INCHES MAXIMUM |
| RIB MAJOR DIAMETER | 0.612 INCHES MINIMUM AND 0.617 INCHES MAXIMUM |
| RIB QUANTITY | 39 |
| SHOULDER DIAMETER | 0.588 INCHES MINIMUM AND 0.593 INCHES MAXIMUM FIRST SHOULDER |
| SHOULDER LENGTH | 0.356 INCHES MINIMUM AND 0.366 INCHES MAXIMUM FIRST SHOULDER |
| SHOULDER SHAPE | RIBBED FIRST SHOULDER |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 1.000 INCHES MINIMUM |
| THREAD SERIES DESIGNATOR | UNF |
| THREAD QUANTITY PER INCH | 20 |