| THREAD SERIES DESIGNATOR | UNC |
| THREAD LENGTH | 0.812 INCHES MINIMUM |
| FASTENER LENGTH | 1.188 INCHES MINIMUM AND |
| 1.250 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 410 OR |
| STEEL COMP 416 OR |
| STEEL COMP 430 OVERALL |
| HEAD STYLE | HEXAGON |
| THREAD DIRECTION | RIGHT-HAND |
| NOMINAL THREAD DIAMETER | 0.312 INCHES |
| THREAD QUANTITY PER INCH | 18 |
| THREAD CLASS | 2A |
| MATERIAL DOCUMENT AND CLASSIFICATION | 66 FED STD ALL MATERIAL RESPONSES OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 235.0 BRINELL STANDARD MAXIMUM OVERALL |
| MINIMUM TENSILE STRENGTH | 70000 POUNDS PER SQUARE INCH |
| MINIMUM YIELD STRENGTH | 40000 POUNDS PER SQUARE INCH |
| HEAD HEIGHT | 0.195 INCHES MINIMUM AND |
| 0.211 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.489 INCHES MINIMUM AND |
| 0.500 INCHES MAXIMUM |
| HOLE CONFIGURATION STYLE | HEXAGON FLATS |
| HOLE TYPE | DRILLED |
| HOLE QUANTITY | 1 |
| HOLE DIAMETER | 0.062 INCHES NOMINAL |
| SURFACE FINISH | 63.0 MICROINCHES THREADS |
| FEATURES PROVIDED | FINISHED HEAD |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW,CAP,HEXAGON HEAD (FINISHED HEXAGON BOLT),HEAD DRILLED FOR LOCKING WIRE, STEEL, CORROSION-RESISTING, PASSIVATED, UNC-21 |
| NONDEFINITIVE SPEC/STD DATA | 2 TYPE AND |
| 10P STYLE |
| SPEC/STD CONTROLLING DATA | |
| MANUFACTURERS CODE | 81348 |
| NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | FFS85 |
| MANUFACTURERS CODE | 96906 |
| DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | MS51099-35 |