Value Collection 12556CH2 Hex Head Cap Screw 1-1/4-7

Product Description

The VALUE COLLECTION 12556CH2 is a partially threaded hex head cap screw designed for general-purpose fastening in industrial, mechanical, and trade applications. It features a 1-1/4-7 UNC thread pattern and measures 3-1/2 inches under the head. Manufactured from Grade 2 steel with a zinc-plated finish, this fastener meets ASME B18.2.1 and SAE J429 standards. The zinc coating provides basic corrosion resistance, making it suitable for indoor and sheltered outdoor installations. It is sold individually and is commonly specified by maintenance technicians, contractors, and equipment fabricators who need a reliable, standards-compliant fastener in a large diameter.

This hex head cap screw is suited for structural and mechanical assemblies requiring a 1-1/4-7 UNC coarse-thread fastener in the inch measurement system. Typical applications include equipment mounting, bracket fabrication, and general mechanical assembly where Grade 2 steel tensile strength is sufficient. The partial threading allows for clamping force across non-threaded material thicknesses before engagement with a nut or tapped hole. It is appropriate for use in HVAC equipment bases, plumbing support structures, electrical enclosure mounting, and similar trade installations.

Key Features

• 1-1/4-7 UNC coarse-thread pattern for broad compatibility with standard nuts and tapped holes
• 3-1/2 inches length under head for deep-reach fastening applications
• Partially threaded shank allows clamping across unthreaded material
• Grade 2 steel construction meets SAE J429 mechanical property requirements
• Zinc-plated finish provides basic corrosion resistance for dry and sheltered environments
• Conforms to ASME B18.2.1 dimensional standards for hex head cap screws

Compatibility

Designed as a standard inch-series UNC hex head cap screw compatible with any 1-1/4-7 nut, coupling nut, or tapped hole conforming to UNC thread standards in the inch measurement system.

Installation Notes

Installation is performed with a standard hex wrench or socket appropriate for a 1-1/4-inch hex fastener. Always ensure the mating nut or tapped hole is also rated for UNC 1-1/4-7 thread engagement before assembly. Power down or de-energize any equipment before fastening into electrical enclosures or mechanical systems. Do not use impact tools at full torque on Grade 2 fasteners without confirming torque requirements against the equipment manufacturer's specifications.