| COUNTERSINK ANGLE | 80.0 DEGREES MINIMUM AND 84.0 DEGREES MAXIMUM |
| FASTENER LENGTH | 0.734 INCHES MINIMUM AND 0.766 INCHES MAXIMUM |
| HEAD DIAMETER | 0.480 INCHES MINIMUM AND 0.531 INCHES MAXIMUM |
| HEAD STYLE | FLAT COUNTERSUNK |
| INTERNAL DRIVE STYLE | HEXAGON |
| MATERIAL DOCUMENT AND CLASSIFICATION | 86 FED STD ALL MATERIAL RESPONSES OVERALL |
| MATERIAL | STEEL COMP 303 OR STEEL COMP 304 OVERALL |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW, CAP, SOCKET HEAD, FLAT COUNTERSUNK |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | WW-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.501 INCHES MINIMUM |
| THREAD SERIES DESIGNATOR | UNF |
| THREAD QUANTITY PER INCH | 28 |
| WIDTH ACROSS FLATS | 0.1562 INCHES MINIMUM AND 0.1582 INCHES MAXIMUM |