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The VALUE COLLECTION MP34283 is a 5/16-24 UNF hex lock nut with a nylon insert locking mechanism, manufactured from Grade 2 steel with a zinc-plated finish. The nylon insert creates interference with the mating thread, resisting loosening caused by vibration and torque cycling without damaging the fastener. At 23/64 inches in height and 1/2 inch across the flats, this nut fits standard 1/2-inch wrenches and sockets. Right-hand thread direction follows standard convention. Suitable for general mechanical assembly, HVAC equipment mounting, plumbing fixture support structures, and light electrical enclosure work where a low-profile prevailing-torque nut is needed.
This hex lock nut is used in a wide range of trade applications where fastener retention under vibration is required. Common installations include equipment bases, fan assemblies, bracket hardware, and structural sub-assemblies in residential and light commercial settings. The zinc-plated finish provides basic corrosion resistance for indoor or protected outdoor environments. Sold individually, with a minimum order quantity of 50 units, making it appropriate for stocking in service vehicle hardware kits or shop inventory.
Designed as a standard UNF inch-series hex lock nut compatible with 5/16-24 threaded fasteners in general mechanical, HVAC, plumbing, and electrical assembly applications.
Installation requires a standard 1/2-inch wrench or socket. Power down or de-energize any equipment before servicing fastened assemblies on electrical or HVAC components. Nylon insert lock nuts are not rated for repeated reuse — replace the nut if it has been removed and re-torqued multiple times, as the nylon locking element degrades with each cycle. Follow applicable equipment manufacturer torque specifications for the joint being assembled.
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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