| FASTENER LENGTH | 4.156 INCHES MINIMUM AND 4.250 INCHES MAXIMUM |
| HEAD HEIGHT | 0.302 INCHES MINIMUM AND 0.323 INCHES MAXIMUM |
| HEAD STYLE | HEXAGON |
| LOCKING FEATURE | PATCH OR STRIP THREADS |
| MATERIAL | STEEL OVERALL |
| MINIMUM TENSILE STRENGTH | 150000 POUNDS PER SQUARE INCH |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW, CAP, HEXAGON (FINISHED) |
| NOMINAL THREAD DIAMETER | 0.500 INCHES |
| SPECIAL FEATURES | MATERIAL GRADE 8 |
| SURFACE TREATMENT | ZINC AND CHROMATE OVERALL |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 1.250 INCHES MINIMUM AND 1.442 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 13 |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) |
| WIDTH BETWEEN FLATS | 0.736 INCHES MINIMUM AND 0.750 INCHES MAXIMUM |