THREAD SERIES DESIGNATOR | UNJF |
NOMINAL THREAD DIAMETER | 0.750 INCHES |
THREAD QUANTITY PER INCH | 16 |
THREAD CLASS | 3A |
THREAD DIRECTION | RIGHT-HAND |
THREAD LENGTH | 0.641 INCHES MINIMUM AND |
| 0.691 INCHES MAXIMUM |
FASTENER LENGTH | 2.776 INCHES MINIMUM AND |
| 2.806 INCHES MAXIMUM |
MATERIAL | IRON ALLOY 660 OVERALL |
MATERIAL DOCUMENT AND CLASSIFICATION | AMS5731 ASSN STD SINGLE MATERIAL RESPONSE OR |
| AMS5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
SURFACE TREATMENT | CADMIUM AND |
| CHROMATE OVERALL |
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
HEAD STYLE | DISHED HEXAGON |
HEAD HEIGHT | 0.375 INCHES MINIMUM AND |
| 0.390 INCHES MAXIMUM |
WIDTH BETWEEN FLATS | 1.052 INCHES MINIMUM AND |
| 1.065 INCHES MAXIMUM |
GRIP LENGTH | 2.115 INCHES MINIMUM AND |
| 2.135 INCHES MAXIMUM |
GRIP DIAMETER | 0.7480 INCHES MINIMUM AND |
| 0.7490 INCHES MAXIMUM |
SURFACE FINISH | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| 32.0 MICROINCHES GRIP |
| 32.0 MICROINCHES THREADS |
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 2.544 INCHES MINIMUM AND |
| 2.594 INCHES MAXIMUM FIRST HOLE |
SHANK UNTHREADED HOLE DIAMETER | 0.141 INCHES MINIMUM AND |
| 0.151 INCHES MAXIMUM FIRST HOLE |
SPECIFICATION/STANDARD DATA | 80205-NAS6312 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |