Value Collection 12588CH2 Hex Head Cap Screw 1-1/4-7

Product Description

The VALUE COLLECTION 12588CH2 is a partially threaded hex head cap screw designed for heavy-duty fastening in structural and mechanical assemblies. It features a 1-1/4-7 UNC thread size and measures 5-1/2 inches under the head. Manufactured from Grade 2 steel with a zinc-plated finish, this fastener provides corrosion resistance suitable for general industrial and construction applications. It conforms to ASME B18.2.1 and SAE J429 standards, making it appropriate for use in code-sensitive installations. Machinists, millwrights, pipefitters, and general maintenance tradespeople are the typical installers of this hardware.

This cap screw is suited for a wide range of inch-system fastening applications where a large-diameter, partially threaded bolt is required. The partial threading allows the unthreaded shank to serve as a precision-fit bearing surface in bolted joints, which is common in equipment mounting, structural steel connections, and heavy machinery assembly. The zinc coating adds a layer of protection against light moisture and oxidation in indoor or semi-sheltered environments.

Key Features

• 1-1/4-7 UNC thread for high-load, coarse-thread engagement
• 5-1/2 inches under head — partial threading leaves an unthreaded shank for precision-fit joints
• Grade 2 steel construction meets SAE J429 and ASME B18.2.1 standards
• Zinc-plated finish provides corrosion resistance for general-use environments
• Inch measurement system — compatible with standard UNC tooling and hardware

Compatibility

Designed as an OEM-style replacement or general-use fastener for applications requiring a 1-1/4-7 UNC partially threaded hex head cap screw conforming to ASME B18.2.1 and SAE J429 specifications.

Installation Notes

Installation should be performed by a qualified tradesperson using properly sized hex wrenches or impact sockets rated for the fastener diameter. Always ensure mating threads are clean and free of debris before installation. De-energize and lock out any equipment before replacing fasteners in live mechanical assemblies. Do not exceed the rated load capacity for Grade 2 fasteners in high-tension structural applications where Grade 5 or Grade 8 hardware may be specified.