| THREAD SERIES DESIGNATOR | UNC |
| THREAD LENGTH | 1.250 INCHES NOMINAL |
| FASTENER LENGTH | 1.250 INCHES NOMINAL |
| MATERIAL | STEEL CORROSION RESISTING OVERALL |
| HEAD STYLE | HEXAGON |
| THREAD DIRECTION | RIGHT-HAND |
| NOMINAL THREAD DIAMETER | 0.500 INCHES |
| THREAD QUANTITY PER INCH | 13 |
| THREAD CLASS | 2A |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAEJ429 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | ZINC OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | SAEJ129 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 32.0 ROCKWELL C MINIMUM AND |
| 38.0 ROCKWELL C MAXIMUM OVERALL |
| MINIMUM TENSILE STRENGTH | 150000 POUNDS PER SQUARE INCH |
| HEAD HEIGHT | 0.302 INCHES MINIMUM AND |
| 0.323 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.736 INCHES MINIMUM AND |
| 0.750 INCHES MAXIMUM |
| SURFACE FINISH | 63.0 MICROINCHES THREADS |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW,CAP |