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The VALUE COLLECTION KP66133 is a 5/8-11 UNC hex lock nut using a distorted-thread locking style to resist loosening under vibration and dynamic loads. The nut is manufactured from Grade C steel with a zinc-plated and wax finish that provides baseline corrosion resistance and reduces installation torque. A right-hand thread direction follows standard UNC fastener convention. This style of prevailing-torque lock nut is installed by electricians, plumbers, HVAC technicians, and general trade professionals wherever a reliable, reusable fastener is required without the added cost of nylon-insert designs.
The KP66133 is suited for light structural, mechanical, and equipment-mounting applications in residential and commercial settings. The distorted-thread design creates a prevailing torque that holds the nut in position without requiring adhesives or secondary locking hardware. Packaged in quantities of 25 per pack, these nuts are well-suited for jobs that require multiple fasteners of the same size. They are appropriate for use on steel, iron, and similar substrates where the zinc-and-wax finish provides adequate protection.
Designed as a standard replacement or stock hex lock nut for any application using 5/8-11 UNC threaded fasteners in inch-series assemblies.
Installation is performed with a standard hex wrench or socket set sized for 5/8-11 fasteners. De-energize and de-pressurize any system before replacing or installing fasteners on mechanical assemblies. The distorted-thread design is reusable for a limited number of cycles — inspect threads for deformation before reuse in critical applications. Follow applicable codes, including IFGC or NEC guidelines, where fasteners are used in gas or electrical equipment installations.
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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