| THREAD SERIES DESIGNATOR | UNC |
| NOMINAL THREAD DIAMETER | 0.6250 INCHES |
| THREAD QUANTITY PER INCH | 11 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.845 INCHES MINIMUM AND |
| 0.875 INCHES MAXIMUM |
| FASTENER LENGTH | 3.61 INCHES NOMINAL |
| MATERIAL | STEEL OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | ALLOY STEEL PER NASM21472 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | ZINC OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | ASTM B633,TYPE 2,CLASS FE/ZN 5 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| MINIMUM TENSILE STRENGTH | 140000 POUNDS PER SQUARE INCH |
| HEAD STYLE | FLAT CHAMFER |
| HEAD DIAMETER | 0.977 INCHES MINIMUM AND |
| 1.000 INCHES MAXIMUM |
| HEAD HEIGHT | 0.490 INCHES MINIMUM AND |
| 0.500 INCHES MAXIMUM |
| INTERNAL DRIVE STYLE | HEXAGON |
| WIDTH ACROSS FLATS | 0.375 INCHES NOMINAL |
| SHOULDER SHAPE | ROUND ALL SHOULDERS |
| SHOULDER DIAMETER | 0.7460 INCHES MINIMUM AND |
| 0.7480 INCHES MAXIMUM ALL SHOULDERS |
| SHOULDER LENGTH | 2.745 INCHES MINIMUM AND |
| 2.755 INCHES MAXIMUM ALL SHOULDERS |
| SPECIFICATION/STANDARD DATA | 80205-NASM51975 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW,SHOULDER,SOCKET HEAD,HEXAGON,ALLOY STEEL OR NICKEL-COPPER ALLOY,UNC-3A |