Value Collection 1-THN-25F Hex Lock Nut 1/4-28 18-8 Ss

Product Description

The VALUE COLLECTION 1-THN-25F is a 1/4-28 UNF hex lock nut with a nylon insert locking mechanism, manufactured from 18-8 stainless steel with an uncoated finish. The nylon insert creates interference with the mating thread to resist vibration-induced loosening without the need for thread adhesives or separate locking hardware. At 13/64 inches in height with a 7/16-inch width across flats, this is a compact fastener suited to tight assemblies. Licensed tradespeople and maintenance technicians working on HVAC equipment, electrical panels, pool equipment, and plumbing fixtures use this style of nut where stainless corrosion resistance and reliable thread retention are both required.

This hex lock nut is appropriate for residential and light commercial applications where the 1/4-28 UNF fine thread pitch and 18-8 stainless steel construction are specified. Common install scenarios include equipment frames, brackets, and mechanical assemblies exposed to moisture, mild chemicals, or vibration. Fine-thread UNF fasteners are commonly found in HVAC equipment mounting hardware, pump assemblies, and electrical enclosures where precise clamping load and vibration resistance matter. Right-hand thread direction follows standard fastener convention for these applications.

Key Features

• Nylon insert locking style resists loosening from vibration without thread-locking compounds
• 18-8 stainless steel construction provides corrosion resistance in wet or outdoor environments
• 1/4-28 UNF fine thread for precise clamping and use in thin-walled or precision assemblies
• Right-hand thread direction follows standard installation convention
• Uncoated finish — no coating thickness to account for in precision fits
• Compact profile: 13/64 inches high, 7/16 inches across flats

Compatibility

Designed for use with 1/4-28 UNF male-threaded fasteners in standard inch-measure assemblies requiring a nylon insert hex lock nut.

Installation Notes

Installation requires a 7/16-inch wrench or socket. Power down or de-energize any equipment before fastener service on electrical or mechanical assemblies. Nylon insert lock nuts are generally single-use — once the nylon insert has been fully engaged and removed, the locking effectiveness is reduced and replacement is recommended. Torque to the fastener manufacturer's specification for 1/4-28 stainless steel hardware in the given application.