| DISTANCE FROM LARGEST DIAMETER OF BEARING SURFACE OF HEAD TO RIBS | 0.062 INCHES NOMINAL |
| FASTENER LENGTH | 1.625 INCHES MINIMUM AND 1.656 INCHES MAXIMUM |
| FEATURES PROVIDED | CASEHARDENED |
| HEAD DIAMETER | 0.812 INCHES NOMINAL |
| HEAD HEIGHT | 0.229 INCHES MINIMUM AND 0.239 INCHES MAXIMUM |
| HEAD STYLE | FLAT CHAMFER |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 1020 OVERALL |
| MINIMUM TENSILE STRENGTH | 110000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.500 INCHES |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |
| RIB LENGTH | 0.294 INCHES MINIMUM AND 0.304 INCHES MAXIMUM |
| RIB MAJOR DIAMETER | 0.613 INCHES MINIMUM AND 0.618 INCHES MAXIMUM |
| RIB QUANTITY | 39 |
| SHOULDER DIAMETER | 0.594 INCHES NOMINAL FIRST SHOULDER |
| SHOULDER LENGTH | 0.062 INCHES NOMINAL FIRST SHOULDER |
| SHOULDER SHAPE | RIBBED FIRST SHOULDER |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 1.125 INCHES MINIMUM |
| THREAD SERIES DESIGNATOR | UNF |
| THREAD QUANTITY PER INCH | 20 |