| FASTENER LENGTH | 0.375 INCHES NOMINAL |
| HEAD DIAMETER | 0.303 INCHES MINIMUM AND 0.312 INCHES MAXIMUM |
| HEAD HEIGHT | 0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM |
| HEAD STYLE | PAN NO. 2 |
| INTERNAL DRIVE STYLE | HEXAGON |
| LOCKING FEATURE | PATCH THREADS |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5731 OR 5737 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | IRON ALLOY 660 OVERALL |
| NOMINAL THREAD DIAMETER | 0.1900 INCHES |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW,CAP,SOCKET HEAD,UNDRILLED AND DRILLED,PLAIN AND SELF-LOCKING,ALLOY STEEL,CORROSION-RESISTANT STEEL AND HEAT-RESISTANT STEEL,UNRF-3A |
| WIDTH ACROSS FLATS | 0.156 INCHES NOMINAL |
| SPECIFICATION/STANDARD DATA | 80205-NAS1351 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 2700,METHOD 1,TYPE 2 OR 8,CLASS 4 NATIONAL STD/SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.375 INCHES NOMINAL |
| THREAD QUANTITY PER INCH | 32 |
| THREAD SERIES DESIGNATOR | UNRF |