Value Collection R57001292 Hex Head Cap Screw 18-8 Ss

Product Description

The VALUE COLLECTION R57001292 is a hex head cap screw designed for heavy-duty fastening applications requiring corrosion resistance and structural integrity. Sized at 1-1/4-7 UNC thread with a 3-1/2 inch length under head, this screw is partially threaded and manufactured from 18-8 stainless steel with no coating applied. The 18-8 grade stainless construction provides solid resistance to rust and oxidation in wet or chemically exposed environments. Licensed tradespeople and maintenance technicians working on HVAC equipment, plumbing supports, pool mechanical systems, or industrial assemblies will find this fastener suited to demanding install conditions where carbon steel hardware would corrode prematurely.

This hex head cap screw is appropriate for use in both residential and commercial mechanical installations where a large-diameter, coarse-thread UNC fastener is required. Typical applications include equipment mounting, pipe support hardware, pump and motor base assemblies, and structural bracketing in corrosive or outdoor environments. The partial thread engagement allows for clamping force across unthreaded shank sections, which is advantageous in joint assemblies where shear load distribution matters.

Key Features

• 1-1/4-7 UNC coarse thread for high clamping force in standard inch-dimensioned hardware
• 3-1/2 inch length under head accommodates thicker joint stacks and mounting flanges
• 18-8 stainless steel construction resists corrosion in wet, outdoor, and chemically exposed installations
• Partially threaded shank provides improved shear load performance in structural connections
• Uncoated finish — no risk of coating delamination in high-temperature or submerged service
• Inch measurement system, compatible with standard UNC tooling and hardware

Compatibility

Designed for use in standard inch-dimensioned UNC threaded assemblies requiring a 1-1/4-7 hex head cap screw in 18-8 stainless steel.

Installation Notes

Installation of large-diameter fasteners at this size is typically performed by licensed mechanical, HVAC, or plumbing contractors using appropriate hand or power tools rated for the torque involved. Always ensure mating threads and tapped holes or nuts conform to UNC standards before driving. Follow applicable mechanical codes and equipment manufacturer fastener specifications when used in structural or pressure-bearing assemblies. Inspect the fastener and mating hardware for thread damage or contamination before installation.