| THREAD SERIES DESIGNATOR | UNJF | 
| NOMINAL THREAD DIAMETER | 0.500 INCHES | 
| THREAD QUANTITY PER INCH | 20 | 
| THREAD CLASS | 3A | 
| THREAD DIRECTION | RIGHT-HAND | 
| THREAD LENGTH | 0.600 INCHES MINIMUM AND | 
 | 0.650 INCHES MAXIMUM | 
| FASTENER LENGTH | 1.110 INCHES MINIMUM AND | 
 | 1.140 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 | CHROMATE AND | 
 | CADMIUM OVERALL | 
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CL 3 FED SPEC ALL TREATMENT RESPONSES 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 | 0.250 INCHES MINIMUM AND | 
 | 0.265 INCHES MAXIMUM | 
| WIDTH BETWEEN FLATS | 0.741 INCHES MINIMUM AND | 
 | 0.752 INCHES MAXIMUM | 
| SHOULDER SHAPE | ROUND FIRST SHOULDER | 
| SHOULDER DIAMETER | 0.514 INCHES MINIMUM AND | 
 | 0.515 INCHES MAXIMUM FIRST SHOULDER | 
| SHOULDER LENGTH | 0.490 INCHES MINIMUM AND | 
 | 0.510 INCHES MAXIMUM FIRST SHOULDER | 
| SPECIFICATION/STANDARD DATA | 80205-NAS2908 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |