| INTERNAL DRIVE STYLE | HEXAGON |
| WIDTH ACROSS FLATS | 0.094 INCHES NOMINAL |
| LOCKING FEATURE | SELF-LOCKING FIRST HOLE |
| SELF-LOCKING SECOND HOLE |
| HOLE TYPE | DRILLED |
| HOLE QUANTITY | 2 |
| HOLE DIAMETER | 0.033 INCHES MINIMUM AND |
| 0.039 INCHES MAXIMUM |
| SPECIAL FEATURES | N = HEAT RESISTANT. 04 = SCREW SIZE. H = DRILLED HEAD. 21 = 21/16TH. STAINLESS STEEL ALLOY A286. 04 SCREW SIZE = 2 DRILLED HOLED SPACED 180 DEG. |
| SPECIFICATION/STANDARD DATA | NAS1352 MANUFACTURERS SPECIFICATION CONTROL |
| ENVIRONMENTAL ATTRIBUTE CODE | NON-CADMIUM PRODUCT |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW CAP SOCK HEAD DRILL ALLOY STEEL HEAT RESIST UNRC-3A |
| THREAD SERIES DESIGNATOR | UNRC |
| NOMINAL THREAD DIAMETER | 0.1120 INCHES |
| THREAD QUANTITY PER INCH | 40 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.750 INCHES NOMINAL |
| FASTENER LENGTH | 1.4205 INCHES MINIMUM AND |
| 1.4245 INCHES MAXIMUM |
| MATERIAL | STEEL CORROSION RESISTING OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS5731 (UNS S66286) INTERNATIONAL STD/SPEC ALL MATERIAL RESPONSES AND |
| AMS5737 (UNS S66286). INTERNATIONAL STD/SPEC ALL MATERIAL RESPONSES OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 INTERNATIONAL STD/SPEC ALL TREATMENT RESPONSES OVERALL |
| HEAD STYLE | FLAT CHAMFER |
| HEAD DIAMETER | 0.176 INCHES MINIMUM AND |
| 0.183 INCHES MAXIMUM |
| HEAD HEIGHT | 0.108 INCHES MINIMUM AND |
| 0.112 INCHES MAXIMUM |
| CHAMFER ANGLE | 30.0 DEGREES MINIMUM AND |
| 45.0 DEGREES MAXIMUM |