| THREAD SERIES DESIGNATOR | UNC |
| THREAD LENGTH | 0.469 INCHES MINIMUM AND |
| 0.500 INCHES MAXIMUM |
| FASTENER LENGTH | 0.469 INCHES MINIMUM AND |
| 0.500 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 304 OR |
| STEEL COMP 304L OR |
| STEEL COMP 305 OR |
| STEEL COMP 316 OR |
| STEEL COMP 316L OR |
| STEEL COMP 384 OVERALL |
| HEAD STYLE | HEXAGON |
| THREAD DIRECTION | RIGHT-HAND |
| NOMINAL THREAD DIAMETER | 0.2500 INCHES |
| THREAD QUANTITY PER INCH | 20 |
| THREAD CLASS | 2A |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM F593, 18-9LW COMP ALSO ACCEPTABLE ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | OXIDE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-DTL-13924, CL 4(NOT AVAILABLE FOR 316 OR 316L) MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| COLOR | BLACK OVERALL |
| HARDNESS RATING | 80.0 ROCKWELL B NOMINAL OVERALL |
| MINIMUM TENSILE STRENGTH | 80000 POUNDS PER SQUARE INCH |
| MINIMUM YIELD STRENGTH | 30000 POUNDS PER SQUARE INCH |
| HEAD HEIGHT | 0.150 INCHES MINIMUM AND |
| 0.163 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.4280 INCHES MINIMUM AND |
| 0.4375 INCHES MAXIMUM |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW,CAP,HEXAGON HEAD (FINISHED HEXAGON BOLT),STEEL,CORROSION RESISTING,PASSIVATED,UNC-2A |
| SPECIFICATION/STANDARD DATA | 80205-NASM35307 NATIONAL STD/SPEC |