Value Collection CNFI5025-100BX Castle Lock Nut 1/4-28

Product Description

The VALUE COLLECTION CNFI5025-100BX is a castle lock nut designed for secure fastening in mechanical and structural assemblies. Manufactured from Grade 5 steel with a bright uncoated finish, this nut meets ANSI B18.2.2 dimensional standards. It features a 1/4-28 inch thread size with right-hand threading, standing 9/32 inches high with a 7/16-inch width across flats. Castle lock nuts are commonly installed by maintenance technicians, millwrights, and trade professionals where a cotter pin or safety wire is used to positively lock the nut against rotation under vibration or dynamic loads.

This castle lock nut is suited for inch-system fastener applications in HVAC equipment frames, plumbing fixtures, electrical enclosures, and general mechanical assemblies requiring a reliable locking fastener. Its compact 1/4-28 thread profile makes it appropriate for light-duty to medium-duty connections where positive retention is required. The uncoated bright finish is appropriate for interior or protected environments where corrosion exposure is minimal.

Key Features

• Castle-style lock nut design accepts cotter pin or safety wire for positive anti-rotation retention
• Grade 5 steel construction provides reliable tensile strength for mechanical fastening applications
• 1/4-28 right-hand thread with ANSI B18.2.2 compliance ensures dimensional interchangeability
• Bright uncoated finish suitable for dry or protected indoor installation environments
• Inch measurement system for compatibility with standard SAE fastener tooling

Compatibility

Designed as an OEM-style replacement or service fastener for mechanical assemblies using 1/4-28 inch-thread hardware conforming to ANSI B18.2.2 standards.

Installation Notes

Installation requires standard 7/16-inch hex tooling. A cotter pin or safety wire of appropriate diameter should be inserted through the castle slots after torquing to lock the nut in position. Ensure mating bolt threads are clean and free of damage before installation. Follow applicable mechanical and structural codes for fastener torque requirements based on the specific application.