Stewart Fastener 3720CHSB Silicon Bronze Hex Head Bolt

Product Description

The STEWART FASTENER 3720CHSB is a 3/8-inch by 1-1/4-inch hex head bolt manufactured in silicon bronze. Silicon bronze fasteners are specified when corrosion resistance is critical — common in marine, pool, plumbing, and coastal HVAC applications where stainless steel may be cost-prohibitive or where galvanic compatibility with copper alloys is required. The hex head drive allows standard wrench or socket installation. This bolt is a direct fit for contractors and service technicians who need a corrosion-resistant threaded fastener in a 3/8-inch diameter, coarse or fine thread configuration typical of this size class.

Silicon bronze hex head bolts in this size range are used across residential and commercial applications including pool equipment mounting, plumbing fixture attachment, HVAC curb and equipment fastening in coastal environments, and general trade work where moisture or chemical exposure is a factor. Electricians and plumbers working in wet or marine-adjacent environments frequently specify bronze hardware to avoid rust bleed and premature fastener failure.

Key Features

• Silicon bronze construction provides superior corrosion resistance in wet, marine, and chemically exposed environments
• Hex head design accepts standard wrenches and sockets for reliable torque application
• 3/8-inch diameter by 1-1/4-inch length covers common equipment mounting and fixture attachment applications
• Compatible with copper alloy and bronze fittings without galvanic incompatibility concerns

Compatibility

Designed as an OEM-style replacement or service fastener for trade applications requiring a 3/8-inch by 1-1/4-inch hex head bolt in silicon bronze construction.

Installation Notes

Installation is performed by licensed HVAC technicians, plumbers, electricians, or pool service professionals using standard hand tools or powered drivers with a socket attachment. Apply appropriate thread lubricant or anti-seize compound when fastening into dissimilar metals. Do not overtorque bronze fasteners, as silicon bronze has lower tensile strength than steel hardware of the same size. Follow applicable codes for the trade and application in which these fasteners are used.

Technical Specifications

• Material: Silicon Bronze
• Head Type: Hex Head
• Diameter: 3/8 inches
• Length: 1-1/4 inches
• UPC: 662352260558

Standard Information

• Brand: STEWART FASTENER
• Manufacturer Part Number: 3720CHSB