| COUNTERSINK ANGLE | 100.0 DEGREES NOMINAL |
| FASTENER LENGTH | 1.140 INCHES MINIMUM AND 1.187 INCHES MAXIMUM |
| FEATURES PROVIDED | DRY FILM LUBRICANT AND CASEHARDENED |
| GRIP DIAMETER | 0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM |
| HEAD HEIGHT | 0.0878 INCHES MINIMUM AND 0.0898 INCHES MAXIMUM |
| HEAD DIAMETER | 0.6287 INCHES MINIMUM AND 0.6335 INCHES MAXIMUM |
| HEAD STYLE | FLAT COUNTERSUNK UNDERCUT |
| INTERNAL DRIVE STYLE | HIGH-TORQUE |
| MATERIAL DOCUMENT AND CLASSIFICATION | NAS621 NATIONAL STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | ST7-251 MFR REF SINGLE MATERIAL RESPONSE RING |
| MATERIAL | RUBBER SYNTHETIC RING |
| MATERIAL | TITANIUM ALLOY OVERALL |
| NOMINAL THREAD DIAMETER | 0.3125 INCHES |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW, CLOSE TOLERANCE |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.531 INCHES NOMINAL |
| THREAD QUANTITY PER INCH | 24 |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) |