Value Collection 1-THN-87C Hex Lock Nut 7/8-9 18-8 Ss

Product Description

The VALUE COLLECTION 1-THN-87C is a 7/8-9 UNC hex lock nut with a nylon insert locking style, manufactured from 18-8 stainless steel with a bright uncoated finish. The nylon insert creates interference with the mating thread to resist loosening caused by vibration or torque. Standing 15/32 inches high with a 1-1/4 inch width across flats, this nut is dimensionally standard for UNC fastener assemblies. It is installed by mechanics, millwrights, plumbers, and general tradespeople wherever a corrosion-resistant prevailing-torque nut is required. The right-hand thread direction follows standard fastener convention.

This hex lock nut is suited for use in corrosive or moisture-prone environments where stainless steel fastener hardware is specified. Typical applications include HVAC equipment mounting, plumbing fixture assemblies, pool and spa equipment frames, electrical enclosure hardware, and general mechanical assemblies requiring vibration resistance. The 18-8 stainless steel grade provides good resistance to rust and oxidation without a sacrificial coating, making it a reliable choice for both indoor and outdoor installations.

Key Features

• 7/8-9 UNC right-hand thread — standard coarse-thread sizing for broad fastener compatibility
• Nylon insert locking style provides prevailing torque to resist loosening under vibration
• 18-8 stainless steel construction offers corrosion and oxidation resistance
• Bright uncoated finish — no plating to chip, peel, or react with stainless hardware
• 15/32 inch height and 1-1/4 inch width across flats match standard UNC hex nut dimensions
• Width across points of 1.4030 inches for proper wrench and socket fit

Compatibility

Designed as a standard UNC prevailing-torque replacement hex lock nut for 7/8-9 threaded fastener assemblies requiring an 18-8 stainless steel nylon insert nut.

Installation Notes

Installation requires a standard 1-1/4 inch wrench or socket. Power down or de-energize any associated equipment before performing fastener work in electrical or HVAC applications. The nylon insert is single-use by design — a nylon insert lock nut that has been fully run on and removed should be replaced rather than reused, as the insert loses prevailing-torque effectiveness after the first installation. Follow applicable mechanical or structural codes for the specific assembly being fastened.