Value Collection NL5XX00400-050BX M4x0.7 Nylon Insert Lock Nut

Product Description

The VALUE COLLECTION NL5XX00400-050BX is an M4x0.7 hex lock nut with a nylon insert, manufactured from Class 316/A4 stainless steel with a bright, uncoated finish. The nylon insert provides reliable prevailing-torque locking without the need for thread-locking compounds, keeping the nut securely in place under vibration and thermal cycling. At 7.00 millimeters across the flats and 5.00 millimeters in height, this compact fastener is sized for standard M4 threaded applications. It conforms to DIN 985 and carries a right-hand thread direction. Sold in a minimum order quantity of 50 pieces, this nut is suited for fabrication, mechanical assembly, and maintenance operations where corrosion resistance and secure fastening are required.

This hex lock nut is appropriate for use in marine, chemical-processing, food-service, and outdoor environments where 316 stainless steel is specified for its superior resistance to chlorides and corrosive media. The nylon insert style is commonly installed in mechanical assemblies, equipment enclosures, HVAC structural components, plumbing fixtures, and electrical panel hardware. It is a practical choice for any application where vibration-induced loosening is a concern and a reusable, non-destructive locking method is preferred over deforming-style lock nuts.

Key Features

• Nylon insert locking style provides prevailing-torque retention without adhesives or thread deformation
• 316/A4 stainless steel construction offers high resistance to corrosion, including chloride environments
• Conforms to DIN 985 fastener standard for consistent dimensional and mechanical performance
• Bright, uncoated finish — no plating to flake or add dimensional variability
• Right-hand thread direction, M4x0.7 pitch, compatible with standard M4 threaded rod and bolts
• Sold in packs of 50 to support production-volume and service-stock needs

Compatibility

Designed as a DIN 985-compliant nylon insert hex lock nut for use with M4x0.7 right-hand threaded fasteners in 316/A4 stainless steel applications.

Installation Notes

Installation is typically performed by mechanical assemblers or maintenance technicians using a standard 7 millimeter wrench or socket. Power down and de-energize any equipment before accessing fastener locations in live electrical or HVAC assemblies. Nylon insert lock nuts are generally rated for single use — the locking torque of the nylon insert diminishes with repeated removal and reinstallation, so replacement with a new nut is recommended after disassembly in critical joints. Do not exceed the rated torque range for M4 stainless fasteners, and avoid using impact tools that may damage the nylon insert.