| NAVAL SHIP SYSTEMS COMMAND | 80064 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 1.500 INCHES MAXIMUM |
| FASTENER LENGTH | 1.460 INCHES MINIMUM AND 1.500 INCHES MAXIMUM |
| HEAD STYLE | FLAT CHAMFER |
| HEAD DIAMETER | 0.550 INCHES MINIMUM AND 0.562 INCHES MAXIMUM |
| HEAD HEIGHT | 0.368 INCHES MINIMUM AND 0.375 INCHES MAXIMUM |
| LOCKING FEATURE | PATCH THREADS OR PELLET THREADS OR STRIP THREADS |
| INTERNAL DRIVE STYLE | HEXAGON |
| NOMINAL THREAD DIAMETER | 0.375 INCHES |
| WIDTH ACROSS FLATS | 0.312 INCHES NOMINAL |
| THREAD QUANTITY PER INCH | 16 |
| MINIMUM TENSILE STRENGTH | 130000 POUNDS PER SQUARE INCH |
| MINIMUM YIELD STRENGTH | 90000 POUNDS PER SQUARE INCH |
| MATERIAL | PLASTIC POLYAMIDE LOCKING FEATURENICKEL ALLOY K-500 FASTENER |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-N-286 CL A ANNEALED AND AGE HARDENED FED SPEC SINGLE MATERIAL RESPONSE FASTENER |
| THREAD SERIES DESIGNATOR | UNC |
| An externally threaded fastener whose threaded portion is of one nominal diameter. The head has an internal socket or multiple spline for use with an inserted driver. A locking feature may be incorporated in the design of the head or threads. Excludes items with bevel (conical) heads. See BOLT, INTERNAL WRENCHING. Excludes SCREW, SHOULDER; and SCREW, MACHINE. |
