Value Collection 30639 Hex Lock Nut 5/8-11 316 Ss Nylon Insert 25pk

Product Description

The VALUE COLLECTION 30639 is a 5/8-11 UNC hex lock nut with a nylon insert locking mechanism, manufactured from Grade 316 stainless steel with a bright, uncoated finish. The nylon insert compresses against the mating thread to resist loosening caused by vibration or torque, providing a reliable mechanical lock without secondary locking hardware. Standing 3/4 inches high with a 15/16 inch width across flats, this fastener suits applications where corrosion resistance and thread retention are both required. Licensed trades and industrial maintenance professionals specify this nut for use in wet, marine, and chemically exposed environments.

This hex lock nut is used in plumbing, marine, food service, chemical processing, and general industrial assembly where corrosion resistance is critical. The Grade 316 stainless steel alloy offers superior resistance to chlorides and acidic environments compared to Grade 304. The right-hand thread direction and UNC thread standard make it compatible with standard 5/8-11 bolts and studs. This listing includes 25 nuts per package, making it suitable for both single-unit repairs and moderate-volume assembly work.

Key Features

• Nylon insert locking style resists loosening under vibration without damaging mating threads
• Grade 316 stainless steel construction for superior corrosion resistance in harsh and marine environments
• 5/8-11 UNC right-hand thread for compatibility with standard inch-series fasteners
• Bright, uncoated finish — no plating to chip, flake, or contaminate the joint
• 3/4 inch height with 15/16 inch width across flats for standard hex tooling
• Sold in a 25-count package to support production and service applications

Compatibility

Designed as a standard replacement or new-installation hex lock nut for any 5/8-11 UNC threaded bolt or stud requiring a nylon insert locking nut in Grade 316 stainless steel.

Installation Notes

Installation is performed by hand or with a standard hex wrench or socket sized for a 15/16 inch hex. Power down or de-energize any associated equipment before fastener service. Nylon insert lock nuts are single-use by design — once fully torqued and removed, the nylon insert is compressed and should not be reused in a safety-critical joint. Follow applicable torque specifications from the equipment manufacturer or relevant industry standards for the given bolt size and material.