| THREAD SERIES DESIGNATOR | UNJF | 
| NOMINAL THREAD DIAMETER | 0.4375 INCHES | 
| THREAD QUANTITY PER INCH | 20 | 
| THREAD CLASS | 3A | 
| THREAD DIRECTION | RIGHT-HAND | 
| THREAD LENGTH | 0.528 INCHES NOMINAL | 
| FASTENER LENGTH | 1.451 INCHES MINIMUM AND | 
 | 1.481 INCHES MAXIMUM | 
| MATERIAL | STEEL COMP 4340 OR | 
 | STEEL COMP E4340 OR | 
 | STEEL COMP 8740 OVERALL | 
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR | 
 | MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OR | 
 | MIL-S-6049 MIL SPEC 3RD MATERIAL RESPONSE OR | 
 | AMS 6322 ASSN STD 3RD MATERIAL RESPONSE OVERALL | 
| SURFACE TREATMENT | CADMIUM AND | 
 | CHROMATE OVERALL | 
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-616, TYPE 2, CLASS 2 FED SPEC ALL TREATMENT RESPONSES OVERALL | 
| MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH | 
| MINIMUM YIELD STRENGTH | 95000 POUNDS PER SQUARE INCH | 
| HEAD STYLE | DISHED HEXAGON | 
| HEAD HEIGHT | 0.219 INCHES MINIMUM AND | 
 | 0.234 INCHES MAXIMUM | 
| WIDTH BETWEEN FLATS | 0.676 INCHES MINIMUM AND | 
 | 0.690 INCHES MAXIMUM | 
| SHOULDER SHAPE | ROUND FIRST SHOULDER | 
| SHOULDER DIAMETER | 0.4516 INCHES MINIMUM AND | 
 | 0.4526 INCHES MAXIMUM FIRST SHOULDER | 
| SHOULDER LENGTH | 0.928 INCHES MINIMUM AND | 
 | 0.948 INCHES MAXIMUM FIRST SHOULDER | 
| SPECIFICATION/STANDARD DATA | 80205-NAS6207 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |