Value Collection R52001583 Hex Lock Nut 1-1/8-12 Grade 8

Product Description

The VALUE COLLECTION R52001583 is a hex lock nut with a nylon insert, designed to maintain clamping force in bolted assemblies subject to vibration, torque, or thermal cycling. Built to Grade 8 steel with a zinc yellow dichromate finish, this nut delivers high tensile strength and corrosion resistance in demanding mechanical environments. The 1-1/8-12 UNF thread specification makes it suitable for fine-pitch applications where precise thread engagement and controlled preload are required. It measures 1-11/64 inches in height and 1-5/8 inches across the flats, fitting standard hex tooling. Mechanical contractors, millwrights, and equipment technicians install this type of fastener in structural, drivetrain, and industrial assemblies.

This nylon insert lock nut is used in residential and commercial mechanical applications where vibration-resistant fastening is critical. Common install scenarios include equipment mounts, HVAC framework, pump housings, and structural brackets requiring a fine-thread UNF fastener. The right-hand thread direction is standard for the vast majority of mechanical assemblies. It is sold individually and is appropriate wherever a single high-strength, self-locking hex nut in the 1-1/8-12 thread size is needed.

Key Features

• Nylon insert locking mechanism resists loosening from vibration and dynamic loads
• Grade 8 steel construction provides high tensile and proof load strength
• Zinc yellow dichromate finish offers corrosion resistance in exposed or mildly harsh environments
• 1-1/8-12 UNF fine-pitch thread for precise engagement and controlled preload
• Right-hand thread direction compatible with standard tooling and fastener systems
• Inch measurement system with UNSPSC classification 31161716 for procurement accuracy

Compatibility

Designed as an OEM-style replacement or service fastener for mechanical assemblies requiring a 1-1/8-12 UNF Grade 8 nylon insert hex lock nut with a zinc yellow dichromate finish.

Installation Notes

Installation should be performed by a qualified mechanic or trades professional using a properly sized hex wrench or socket matching the 1-5/8-inch across-flats dimension. De-energize and isolate any equipment before servicing fastened assemblies. Nylon insert lock nuts are intended for single-use applications — once the nylon locking element has been compressed, reuse may reduce locking effectiveness. Follow applicable mechanical codes and equipment manufacturer torque specifications when tightening.