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The VALUE COLLECTION NL5XX01600-010BX is an M16x2 hex lock nut with a nylon insert locking mechanism, manufactured from Grade 316 A4 stainless steel with a bright uncoated finish. The nylon insert creates interference with the mating thread, resisting loosening caused by vibration and torque cycling without requiring thread-locking compound. Built to DIN 985 standards, this fastener is sized at 24.00 mm across the flats and 16.00 mm in height. The right-hand thread pattern is standard for general mechanical assembly. Plumbers, HVAC installers, and industrial maintenance technicians reach for 316-grade hardware when the fastener will face moisture, salt spray, or corrosive process fluids.
This hex lock nut is suited for marine, coastal, chemical processing, food service, and outdoor mechanical installations where fastener corrosion resistance is a priority. The 316 A4 stainless alloy provides superior chloride resistance compared to 304-grade material, making it appropriate for stainless-dominated assemblies in HVAC equipment, pump skids, pipe hangers, and similar trade applications. Single-piece packaging allows direct replacement sourcing for service and repair work.
Designed as an OEM-style replacement or maintenance stocking fastener for metric M16x2 threaded assemblies requiring a DIN 985 nylon insert hex lock nut in 316 stainless steel.
Installation should be performed by qualified mechanical, plumbing, or HVAC trade professionals using calibrated metric wrenching tools sized to 24.00 mm across flats. Nylon insert lock nuts are single-use by design — once the nylon has been fully engaged and removed, the locking torque is reduced and the nut should be replaced rather than reused. Confirm the mating fastener thread is clean and undamaged before assembly. Follow applicable mechanical and structural codes for the specific installation environment.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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