Value Collection 440033 1/4-20 Unc Hex Lock Nut 25-pack

Product Description

The VALUE COLLECTION 440033 is a 1/4-20 UNC hex lock nut featuring an expanding flex top design in 18-8 stainless steel. The flex top expands under torque to create a secure, vibration-resistant lock without a separate nylon insert, making it suitable for applications where nylon inserts are restricted by temperature or chemical exposure. At 19/64 inches high and uncoated, this nut delivers corrosion resistance inherent to 18-8 stainless. It meets MIL-S-7742 military specifications. Each package contains 25 nuts. Licensed electricians, HVAC technicians, plumbers, and mechanical contractors use this fastener when assembling equipment panels, brackets, and structural connections requiring a reliable, reusable locking thread.

This nut is suited for light-to-medium fastening applications in residential and commercial mechanical, electrical, and plumbing assemblies. The 1/4-20 UNC thread is one of the most common coarse-thread sizes in North American trade work, found in equipment enclosures, control panel mounting, conduit support hardware, HVAC unit frames, and plumbing fixture brackets. The 18-8 stainless steel construction makes it appropriate for damp or corrosive environments where carbon steel hardware would deteriorate. Sold in a package of 25, this nut is suitable for job-lot stocking in maintenance, repair, and new-installation work.

Key Features

• Expanding flex top provides vibration-resistant locking action without a nylon insert
• 18-8 stainless steel construction offers corrosion resistance for damp and outdoor-adjacent environments
• Meets MIL-S-7742 military specifications for thread and dimensional standards
• Uncoated finish — no coating degradation risk under torque or in chemical exposure
• 1/4-20 UNC coarse thread — widely compatible with standard North American fastener hardware
• Sold in a 25-count package for job-lot or shop-stock use

Compatibility

Designed as a standard 1/4-20 UNC hex lock nut for use with any 1/4-20 UNC threaded bolt or stud requiring a locking fastener in trade mechanical, electrical, or plumbing assemblies.

Installation Notes

Install and remove using a standard hex wrench or nut driver sized for a 1/4-20 hex nut. De-energize all electrical circuits and shut off fluid systems before working on any assembly where fasteners are being replaced or tightened. The flex top locking feature is reusable but should be inspected for deformation after repeated removal cycles. Follow applicable codes — NEC, IPC, or IFGC as relevant to the assembly type — for fastener material and torque requirements.