| 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 | 0.954 INCHES MINIMUM AND | 
 | 0.984 INCHES MAXIMUM | 
| MATERIAL | STEEL COMP E4340 OR | 
 | STEEL COMP 8740 OVERALL | 
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR | 
 | MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OR | 
 | AMS6322 ASSN STD 2ND MATERIAL RESPONSE OVERALL | 
| SURFACE TREATMENT | CADMIUM AND | 
 | CHROMATE OVERALL | 
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TYPE 2,CLASS 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 | 
| SHOULDER SHAPE | ROUND FIRST SHOULDER | 
| SHOULDER DIAMETER | 0.3422 INCHES MINIMUM AND | 
 | 0.3432 INCHES MAXIMUM FIRST SHOULDER | 
| SHOULDER LENGTH | 0.490 INCHES MINIMUM AND | 
 | 0.510 INCHES MAXIMUM FIRST SHOULDER | 
| SPECIFICATION/STANDARD DATA | 80205-NAS6605 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |