| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| FASTENER LENGTH | 1.531 INCHES NOMINAL |
| GRIP DIAMETER | 0.311 INCHES MINIMUM AND 0.312 INCHES MAXIMUM |
| GRIP LENGTH | 1.052 INCHES MINIMUM AND 1.072 INCHES MAXIMUM |
| HEAD DIAMETER | 0.625 INCHES MINIMUM AND 0.635 INCHES MAXIMUM |
| HEAD STYLE | FLAT COUNTERSUNK |
| INTERNAL DRIVE STYLE | OFFSET CRUCIFORM (TORQUE SET) |
| MATERIAL | STEEL COMP 4140 OR STEEL COMP 4340 OR STEEL COMP 8740 OVERALL |
| NOMINAL THREAD DIAMETER | 0.312 INCHES |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.469 INCHES NOMINAL |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) |
| THREAD QUANTITY PER INCH | 24 |