| DISTANCE FROM LARGEST DIAMETER OF BEARING SURFACE OF HEAD TO RIBS | 0.031 INCHES NOMINAL |
| FASTENER LENGTH | 1.250 INCHES MINIMUM AND 1.312 INCHES MAXIMUM |
| HARDNESS RATING | 20.0 ROCKWELL C MINIMUM AND 25.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD DIAMETER | 0.625 INCHES NOMINAL |
| HEAD HEIGHT | 0.188 INCHES NOMINAL |
| HEAD STYLE | PAN NO. 2 |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 1040 OVERALL |
| MINIMUM TENSILE STRENGTH | 110000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.375 INCHES |
| NONSTANDARD THREAD PITCH DIAMETER | +0.3446 TO 0.3479 INCHES |
| RIB LENGTH | 0.156 INCHES NOMINAL |
| RIB MAJOR DIAMETER | 0.490 INCHES MINIMUM AND 0.495 INCHES MAXIMUM |
| SHOULDER DIAMETER | 0.438 INCHES NOMINAL FIRST SHOULDER |
| SHOULDER LENGTH | 0.188 INCHES NOMINAL FIRST SHOULDER |
| SHOULDER SHAPE | RIBBED FIRST SHOULDER |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.875 INCHES MINIMUM AND 0.937 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 24 |
| THREAD SERIES DESIGNATOR | UNF |