Value Collection R57500138 Acorn Nut 5/8-11 Unc Grade 18-8

Product Description

The VALUE COLLECTION R57500138 is a standard acorn nut machined from Grade 18-8 stainless steel with a 5/8-11 UNC right-hand thread. The domed cap design covers and protects exposed thread ends, preventing corrosion, thread damage, and contact hazards on finished assemblies. At 1 inch width across flats and 63/64 inch overall height, this nut fits standard hex tooling and installs wherever a capped fastener finish is required. The uncoated 18-8 stainless construction provides solid corrosion resistance in moderate-exposure environments without a secondary coating that could flake or wear. This part weighs 0.15 pounds and is sold individually.

This acorn nut is suited for general mechanical, plumbing, electrical enclosure, and light structural applications where exposed fastener ends need protection or a clean finished appearance. The 5/8-11 UNC thread size is common in equipment frames, panels, hangers, and mounting assemblies across HVAC, plumbing, and electrical trades. Uncoated stainless is appropriate for indoor and moderate outdoor use where chloride exposure is not extreme.

Key Features

• Grade 18-8 stainless steel construction for corrosion resistance without plating
• 5/8-11 UNC right-hand thread matches standard unified coarse fastener systems
• Domed acorn cap protects exposed bolt or stud threads from damage and contact
• 1 inch width across flats accepts standard hex wrenches and sockets
• Uncoated silver finish with no risk of coating delamination
• Sold individually with no minimum order requirement beyond one piece

Compatibility

Designed as a standard replacement or new-installation acorn nut for any 5/8-11 UNC threaded bolt or stud requiring a capped hex nut finish.

Installation Notes

Installation requires a standard 1 inch hex wrench or socket. Verify that the mating bolt or stud is also 5/8-11 UNC before threading to avoid cross-threading. Apply appropriate thread torque per the assembly specification for the host equipment. Stainless fasteners can gall under high torque — apply a small amount of anti-seize compound to the threads when working with stainless-to-stainless contact.