Stewart Fastener 3120CHSB Silicon Bronze Hex Bolt

Product Description

The STEWART FASTENER 3120CHSB is a silicon bronze hex head bolt sized at 5/16 inch diameter by 1-1/4 inch length. Silicon bronze fasteners are specified where corrosion resistance is critical, particularly in marine, coastal, plumbing, and outdoor mechanical applications. The hex head drive pattern accepts standard wrenches and sockets for secure installation. This bolt is suited for trade professionals who require a non-ferrous fastener that resists oxidation and galvanic corrosion in wet or chemically aggressive environments.

This bolt is typically used in light structural, mechanical, and equipment-mounting applications where steel fasteners would corrode prematurely. Common install scenarios include pool and spa equipment assemblies, marine hardware, exterior plumbing fixture mounting, and HVAC equipment with exposure to corrosive conditions. Its compact 1-1/4 inch length suits shallow-clearance fastening tasks across a range of trade applications.

Key Features

• Silicon bronze alloy construction for superior corrosion resistance in wet and marine environments
• Hex head drive accepts standard wrenches and sockets
• 5/16 inch diameter by 1-1/4 inch length for compact fastening applications
• Non-ferrous material prevents galvanic corrosion when used with copper or bronze fittings
• Suitable for pool, spa, marine, plumbing, and outdoor HVAC equipment mounting

Compatibility

Designed as a standard silicon bronze hex head bolt suitable for trade applications requiring non-ferrous, corrosion-resistant fasteners in mechanical, plumbing, pool, and marine equipment assemblies.

Installation Notes

Installation is performed by licensed plumbers, HVAC technicians, pool service professionals, or experienced tradespeople using standard hex wrenches or sockets. Always de-energize and shut off fluid supply to equipment before accessing fastener locations on pressurized or energized assemblies. Do not overtighten silicon bronze fasteners, as the alloy has lower tensile strength than steel and is susceptible to thread damage under excessive torque. Follow applicable codes including IPC and IFGC where fasteners are used in gas or plumbing equipment assemblies.

Technical Specifications

• Material: Silicon Bronze
• Head Type: Hex Head
• Diameter: 5/16 inches
• Length: 1-1/4 inches

Standard Information

• Brand: STEWART FASTENER
• Manufacturer Part Number: 3120CHSB