Value Collection B52001663 Heavy Hex Lock Nut 1-8 Unc

Product Description

The VALUE COLLECTION B52001663 is a heavy hex lock nut with a nylon insert, designed for 1-8 UNC threaded fastener applications. The nylon insert deforms around the bolt threads to create friction-based prevailing torque, resisting loosening caused by vibration and dynamic loads without requiring a separate lock washer or adhesive. Constructed from Grade 2 steel with a zinc-plated finish, this nut stands 1-9/32 inches high and measures 1-5/8 inches across the flats. It is sized for heavy-duty mechanical, structural, and industrial assembly work where a standard hex nut does not provide adequate locking force.

This nut is suited for general industrial, commercial, and trade applications involving 1-8 UNC coarse-thread fasteners. Common install scenarios include equipment mounting, pipe support hardware, mechanical frames, HVAC structural components, and electrical enclosure assemblies. The right-hand thread direction is standard for conventional fastening. Sold individually, it is appropriate for repair, replacement, or single-point assembly needs across maintenance and construction trades.

Key Features

• Nylon insert provides prevailing torque locking without adhesives or secondary locking hardware
• 1-8 UNC coarse thread for broad fastener compatibility in heavy-duty applications
• Grade 2 steel construction for general-purpose structural strength
• Zinc-plated finish provides basic corrosion resistance in indoor and sheltered environments
• Heavy hex profile with 1-5/8 inch across-flats for high-torque wrench engagement
• Right-hand thread direction follows standard fastening convention

Compatibility

Designed for use with 1-8 UNC coarse-thread bolts and studs. Meets UNC fastener standard. Does not meet military specifications.

Installation Notes

Installation requires a heavy hex wrench or socket sized to 1-5/8 inches across flats. De-energize or depressurize any system before servicing fastened components. Nylon insert lock nuts are generally intended for single use — once removed, the nylon insert may not provide the same prevailing torque on reinstallation and replacement is recommended. Follow applicable mechanical or structural codes for torque sequencing on critical joints.