Value Collection 129355 Hex Lock Nut 5/8-11 316 Ss

Product Description

The VALUE COLLECTION 129355 is a nylon insert hex lock nut intended for threaded fastening applications where vibration resistance and corrosion resistance are required. Built to a 5/8-11 UNC thread specification in Grade 316 stainless steel, this nut uses an internal nylon insert that deforms around the bolt threads to resist loosening without requiring thread-locking compound. The bright, uncoated finish preserves the natural surface of the 316 alloy. It measures 3/4 inch in height with a 15/16 inch width across flats. Plumbers, pipefitters, and marine or chemical service technicians commonly install this type of hardware where chloride or moisture exposure would degrade carbon steel fasteners.

This hex lock nut is suited for general mechanical assembly, pipe flange work, structural bracketing, and equipment mounting in environments where corrosion is a concern. Grade 316 stainless steel provides enhanced resistance to pitting in chloride-rich environments compared to Grade 304, making it a practical choice for coastal, chemical processing, food service, and marine installations. Right-hand thread direction follows standard UNC convention.

Key Features

• Nylon insert locking mechanism resists vibration-induced loosening without adhesives or thread-locking compounds
• Grade 316 stainless steel construction for superior corrosion and chloride resistance
• 5/8-11 UNC right-hand thread direction, compatible with standard inch-series bolts and studs
• Bright, uncoated finish maintains dimensional consistency and full alloy properties
• 3/4 inch height and 15/16 inch width across flats for standard hex wrench fitment
• Width across points of 1.0510 inches for precise tool and clearance planning

Compatibility

Designed as a standard UNC 5/8-11 nylon insert hex lock nut for use with any inch-series 5/8-11 threaded bolt or stud in corrosion-resistant fastening assemblies.

Installation Notes

Installation requires a standard hex wrench or socket sized for 15/16 inch across flats. De-energize or isolate any system before fastening into mechanical assemblies under load or pressure. Nylon insert lock nuts are generally intended for single use, as reinstallation reduces the locking effectiveness of the nylon insert. Follow applicable mechanical or structural codes for torque requirements based on joint design and application.