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The VALUE COLLECTION KP86171 is a 3/8-24 UNF hex nut machined from Grade 8 steel and finished with a zinc yellow dichromate coating. Grade 8 steel provides high tensile strength suitable for demanding fastener applications in mechanical, HVAC, and electrical enclosure assemblies. The zinc yellow dichromate finish delivers corrosion resistance while meeting standard trade expectations for fastener durability. Each nut features right-hand threading and measures 9/16 inches across the flats with a height of 21/64 inches. This package contains 100 nuts, making it a practical quantity for job-site or shop stock.
These hex nuts are used wherever a 3/8-24 fine-thread fastener connection is required. The fine UNF thread pitch is common in precision mechanical assemblies, equipment mounting brackets, and structural connections that require tighter thread engagement than coarse UNF counterparts. Suitable for residential and commercial applications across HVAC equipment mounting, electrical panel work, and general trade use. The Grade 8 rating makes them appropriate for higher-load fastener joints where standard Grade 5 nuts would be undersized.
Designed as a standard replacement or stock fastener for any assembly requiring a 3/8-24 UNF hex nut with Grade 8 strength rating.
Installation is performed by any trade professional using a standard 9/16-inch wrench or socket. Ensure mating bolts or studs are also rated Grade 8 or equivalent to maintain joint integrity. De-energize any electrical equipment and shut off mechanical systems before accessing fastener locations in live assemblies. Do not mix thread standards — confirm the mating fastener is UNF, not UNC, before installation.
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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