Value Collection B52001665 Heavy Hex Lock Nut 1-1/4-7 Unc

Product Description

The VALUE COLLECTION B52001665 is a 1-1/4-7 UNC Grade 2 heavy hex lock nut with a nylon insert, designed to resist loosening under vibration and dynamic loads. Constructed from zinc-plated steel, it provides corrosion resistance suitable for general industrial and mechanical applications. The nylon insert creates a prevailing-torque locking action that maintains clamp load without requiring secondary locking hardware. The heavy hex profile offers increased wrench-bearing surface compared to standard hex geometry. Weighing 0.92 pounds, this nut is suited for structural bolting and heavy mechanical assemblies where a reliable, reusable locking fastener is required.

This nut is used in a wide range of trade and industrial applications, including HVAC equipment mounting, mechanical structural connections, pipe support systems, and general equipment assembly. The 1-1/4-7 UNC thread designation indicates a coarse-thread series, which is standard for heavy structural and industrial bolting. The zinc-plated finish makes it appropriate for indoor or sheltered outdoor installations where moderate corrosion protection is needed. Plumbers, pipefitters, HVAC mechanics, and general maintenance technicians regularly use heavy hex lock nuts in equipment anchoring and structural fastening tasks.

Key Features

• 1-1/4-7 UNC coarse-thread specification for heavy structural and industrial bolting
• Nylon insert provides prevailing-torque locking action to resist vibration-induced loosening
• Heavy hex profile with 2 inches width across flats for increased wrench engagement
• Grade 2 steel construction with zinc-plated finish for general-purpose corrosion resistance
• Height of 1-41/64 inches meeting heavy hex dimensional standards
• Reusable locking nut design suitable for maintenance and service applications

Compatibility

Designed as a general-purpose heavy hex lock nut for use with 1-1/4-7 UNC threaded fasteners in structural, mechanical, and industrial bolting applications.

Installation Notes

Installation should be performed by a qualified mechanic or tradesperson using a heavy hex wrench or socket sized to the 2-inch across-flats dimension. Always confirm thread engagement depth meets applicable structural or mechanical code requirements before finalizing torque. The nylon insert is rated for one-time or limited reuse; inspect the insert for wear or deformation before reinstalling in critical applications. Ensure mating bolt threads are clean and free of damage to avoid cross-threading or compromising the locking action.