Value Collection CNFI5050-100BX Castle Lock Nut 1/2-20

Product Description

The VALUE COLLECTION CNFI5050-100BX is a castle lock nut designed for threaded fastener applications requiring a secure, positive locking method. Made from Grade 5 steel with a bright uncoated finish, this nut features a 1/2-20 thread size with right-hand thread direction. The castellated crown profile allows for use with a cotter pin or safety wire to prevent rotation under vibration or dynamic loading. At 9/16 inches high with 3/4 inches across the flats, it is sized for standard 1/2-inch fastener assemblies. Licensed plumbers, millwrights, pipefitters, and mechanical contractors routinely specify castle nuts in demanding installations.

This castle lock nut is suited for mechanical and structural assemblies where thread loosening under vibration or cyclic load is a concern. Typical applications include shaft and axle retention, linkage assemblies, and equipment fastening in residential and light commercial settings. The inch measurement system and ANSI B18.2.2 standard make this a direct fit for common inch-series fastener work across a wide range of trades and maintenance applications.

Key Features

• Castle lock nut profile accepts cotter pin or safety wire for positive rotational lock
• Grade 5 steel construction provides reliable tensile and proof-load performance
• Bright uncoated finish suitable for indoor and protected applications
• Right-hand thread direction for standard installation with conventional tooling
• Conforms to ANSI B18.2.2 fastener standard for dimensional consistency

Compatibility

Designed as an OEM-style replacement or new-installation castle lock nut for 1/2-20 inch-series threaded fastener assemblies conforming to ANSI B18.2.2.

Installation Notes

Installation requires a standard 3/4-inch wrench or socket. Always ensure the mating thread is clean and free of burrs before assembly. After torquing to the assembly specification, align the castle slots with the cotter pin hole in the bolt or shaft and insert an appropriate cotter pin to secure the nut against rotation. De-energize or shut down any powered equipment before servicing fasteners on moving or pressurized assemblies.