| CHAMFER ANGLE | 30.0 DEGREES MINIMUM AND 45.0 DEGREES MAXIMUM |
| FASTENER LENGTH | 2.595 INCHES MINIMUM AND 2.625 INCHES MAXIMUM |
| HEAD DIAMETER | 0.729 INCHES MINIMUM AND 0.750 INCHES MAXIMUM |
| HEAD HEIGHT | 0.302 INCHES MINIMUM AND 0.312 INCHES MAXIMUM |
| HEAD STYLE | FLAT CHAMFER |
| INTERNAL DRIVE STYLE | HEXAGON |
| MATERIAL DOCUMENT AND CLASSIFICATION | NAS-21472 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL OVERALL |
| NOMINAL THREAD DIAMETER | 0.375 INCHES |
| SHOULDER DIAMETER | 0.4960 INCHES MINIMUM AND 0.4980 INCHES MAXIMUM OVERALL |
| SHOULDER LENGTH | 1.995 INCHES MINIMUM AND 2.005 INCHES MAXIMUM OVERALL |
| SHOULDER SHAPE | ROUND OVERALL |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW,SHOULDER,SOCKET HEAD,HEXAGON,ALLOY STEEL OR NONFERROUS ALLOYS,UNC-3A |
| SPECIAL FEATURES | DOUBLE SHEAR STRENGTH OF 84 KSI MIN |
| THREAD QUANTITY PER INCH | 16 |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) |
| WIDTH ACROSS FLATS | 0.250 INCHES NOMINAL |
| SPECIFICATION/STANDARD DATA | 80205-NAS-51975 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.595 INCHES MINIMUM AND 0.625 INCHES MAXIMUM |