Value Collection CNFI5075-025BX Castle Lock Nut 3/4-16

Product Description

The VALUE COLLECTION CNFI5075-025BX is a castle lock nut designed for 3/4-16 inch unified fine thread applications. Manufactured from Grade 5 steel with a bright, uncoated finish, this hex lock nut provides reliable thread locking through its castellated design. It measures 13/16 inches in height with a 1-1/8 inch width across flats and follows a right-hand thread direction. The nut conforms to ANSI B18.2.2 standards, making it a recognized, specification-compliant fastener for mechanical and industrial assemblies. Maintenance technicians, millwrights, and field service professionals across HVAC, plumbing, and general mechanical trades install this type of fastener where positive locking is required.

This castle lock nut is suited for residential and commercial applications where vibration or cyclical loading could cause a standard nut to loosen over time. The castellated profile accepts a cotter pin or safety wire routed through a matching drilled shaft or bolt, creating a positive mechanical lock. Typical installation scenarios include rotating shaft assemblies, linkage hardware, and mechanical equipment requiring tamper-evident or vibration-resistant fastening. The 3/4-16 fine thread pitch provides a greater number of threads per inch compared to coarse thread variants, improving clamping force and adjustment precision.

Key Features

• Castle lock design accepts cotter pin or safety wire for positive mechanical thread retention
• Grade 5 steel construction provides tensile strength suitable for general industrial and mechanical use
• 3/4-16 unified fine thread for precise adjustment and higher clamping force
• Right-hand thread direction matches standard bolt and stud configurations
• Bright, uncoated finish for applications where corrosion protection is not a primary requirement
• Conforms to ANSI B18.2.2 fastener standards for dimensional consistency

Compatibility

Designed as an OEM-style replacement or service fastener for any 3/4-16 unified fine thread bolt or stud requiring a castle lock nut per ANSI B18.2.2.

Installation Notes

Installation should be performed by a qualified mechanic or tradesperson using the appropriate open-end or combination wrench sized to 1-1/8 inches across flats. Always torque to the fastener specification required by the equipment manufacturer, then align the castellation slots with the cotter pin hole before installing the cotter pin or safety wire. Remove all power, pressure, or mechanical energy from the assembly before servicing any fastened joint. Inspect the mating bolt or stud for thread damage before installation.