MIDWEST FASTENER CORP 60904 7/16"-20 Zinc Plated Steel Fine Thread Castle Hex Nuts hardware

7/16"-20 Fine Thread Castle Nuts

These zinc-plated steel castle nuts feature a 7/16"-20 fine thread pitch for precise adjustment on bolts or axles with drilled holes. The slotted design allows alignment with a cross-hole so a cotter pin or safety wire can lock the fastener in place. They suit automotive, agricultural and general machinery assemblies where vibration-resistant locking is required. The 60904 part number identifies this specific hardware configuration.

Zinc Plated Steel Construction

The steel body provides structural strength while the zinc plating adds a layer of corrosion resistance for exposed environments. Each nut incorporates a hexagonal base for standard wrench engagement and a slotted crown that accepts a cotter pin or safety wire. This two-piece locking method prevents loosening without damaging threads, allowing disassembly and reuse when maintenance is needed. The fine thread profile offers finer clamping control than coarse alternatives.

Verify Thread And Hole Compatibility

Confirm the mating bolt or axle uses a 7/16"-20 thread and includes a drilled cross-hole at the correct position for the castle slots. Ensure the application calls for a castle nut rather than a prevailing-torque or nylon-insert lock nut, as the locking mechanisms differ. Check that a cotter pin or safety wire of appropriate diameter is available for the slot width. Buyers needing a different thread pitch, diameter or locking style should select an alternative fastener.