| THREAD SERIES DESIGNATOR | UNRC | 
| NOMINAL THREAD DIAMETER | 0.500 INCHES | 
| THREAD QUANTITY PER INCH | 13 | 
| THREAD CLASS | 3A | 
| THREAD DIRECTION | RIGHT-HAND | 
| THREAD LENGTH | 0.750 INCHES MAXIMUM | 
| FASTENER LENGTH | 0.720 INCHES MINIMUM AND | 
|  | 0.750 INCHES MAXIMUM | 
| MATERIAL | IRON ALLOY 660 OVERALL | 
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OR | 
|  | AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | 
| SURFACE TREATMENT | PASSIVATE OVERALL | 
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | 
| HARDNESS RATING | 33.0 ROCKWELL C MINIMUM AND | 
|  | 42.0 ROCKWELL C MAXIMUM OVERALL | 
| MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH | 
| HEAD STYLE | FLAT CHAMFER | 
| HEAD DIAMETER | 0.735 INCHES MINIMUM AND | 
|  | 0.750 INCHES MAXIMUM | 
| HEAD HEIGHT | 0.492 INCHES MINIMUM AND | 
|  | 0.500 INCHES MAXIMUM | 
| INTERNAL DRIVE STYLE | HEXAGON | 
| WIDTH ACROSS FLATS | 0.375 INCHES MINIMUM AND | 
|  | 0.379 INCHES MAXIMUM | 
| SPECIFICATION/STANDARD DATA | 80205-NAS1352 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |