| THREAD SERIES DESIGNATOR | UNJF | 
| NOMINAL THREAD DIAMETER | 0.312 INCHES | 
| THREAD QUANTITY PER INCH | 24 | 
| THREAD CLASS | 3A | 
| THREAD DIRECTION | RIGHT-HAND | 
| THREAD LENGTH | 0.444 INCHES MINIMUM AND | 
|  | 0.494 INCHES MAXIMUM | 
| FASTENER LENGTH | 1.579 INCHES MINIMUM AND | 
|  | 1.609 INCHES MAXIMUM | 
| MATERIAL | STEEL COMP 4140 OR | 
|  | STEEL COMP E4340 OR | 
|  | STEEL COMP 6150 OR | 
|  | STEEL COMP 8735 OR | 
|  | STEEL COMP 8740 OVERALL | 
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR | 
|  | MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OR | 
|  | MIL-S-8503 MIL SPEC 3RD MATERIAL RESPONSE OR | 
|  | MIL-S-6098 MIL SPEC 4TH MATERIAL RESPONSE OR | 
|  | MIL-S-6049 MIL SPEC 5TH MATERIAL RESPONSE OVERALL | 
| SURFACE TREATMENT | CADMIUM OVERALL | 
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 1,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | 
| HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND | 
|  | 40.0 ROCKWELL C MAXIMUM OVERALL | 
| MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH | 
| HEAD STYLE | DISHED HEXAGON | 
| HEAD HEIGHT | 0.156 INCHES MINIMUM AND | 
|  | 0.171 INCHES MAXIMUM | 
| WIDTH BETWEEN FLATS | 0.492 INCHES MINIMUM AND | 
|  | 0.502 INCHES MAXIMUM | 
| GRIP LENGTH | 1.115 INCHES MINIMUM AND | 
|  | 1.135 INCHES MAXIMUM | 
| GRIP DIAMETER | 0.3110 INCHES MINIMUM AND | 
|  | 0.3120 INCHES MAXIMUM | 
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.403 INCHES MINIMUM AND | 
|  | 1.423 INCHES MAXIMUM FIRST HOLE | 
| SHANK UNTHREADED HOLE DIAMETER | 0.066 INCHES MINIMUM AND | 
|  | 0.086 INCHES MAXIMUM FIRST HOLE | 
| SPECIFICATION/STANDARD DATA | 80205-NAS1305 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |