| MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M | 96906 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.630 INCHES MINIMUM AND 0.690 INCHES MAXIMUM |
| FASTENER LENGTH | 1.125 INCHES NOMINAL |
| HEAD STYLE | DOUBLE HEXAGON W/HOLE |
| HEAD HEIGHT | 0.260 INCHES NOMINAL |
| WIDTH BETWEEN FLATS | 0.250 INCHES NOMINAL |
| EXTENDED WASHER DIAMETER | 0.375 INCHES NOMINAL |
| EXTENDED WASHER THICKNESS | 0.040 INCHES MINIMUM |
| HOLE DIAMETER | 0.047 INCHES NOMINAL |
| NOMINAL THREAD DIAMETER | 0.190 INCHES |
| GRIP LENGTH | 0.435 INCHES MINIMUM AND 0.495 INCHES MAXIMUM |
| HOLE QUANTITY | 4 |
| HOLE TYPE | DRILLED |
| FEATURES PROVIDED | FINISHED HEAD |
| THREAD QUANTITY PER INCH | 32 |
| MINIMUM TENSILE STRENGTH | 130000 POUNDS PER SQUARE INCH |
| HARDNESS RATING | 24.0 ROCKWELL C MINIMUM OVERALL AND 35.0 ROCKWELL C MAXIMUM OVERALL |
| MINIMUM YIELD STRENGTH | 85000 POUNDS PER SQUARE INCH |
| HOLE CONFIGURATION STYLE | DOUBLE HEXAGON LONGITUDINAL HOLE |
| SURFACE FINISH | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| SURFACE FINISH | 32.0 MICROINCHES GRIP |
| SURFACE FINISH | 32.0 MICROINCHES THREADS |
| MATERIAL | IRON ALLOY 660 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| THREAD SERIES DESIGNATOR | UNJF |
| An externally threaded fastener designed for insertion through holes in assembled parts and normally intended to be tightened or released by torquing a nut. The threaded and unthreaded portions are both of one nominal diameter of .19 inch (5 mm) or larger. The head is not designed to be held or driven with an inserted driver or by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. Head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. For items having a grip length portion machined to a tolerance of . 15 inch ( . 38 mm) or less, BOLT, SHEAR. See also SCREW, CAP, HEXAGON HEAD and SCREW, MACHINE. |
