Value Collection 781354PS Carriage Bolt 3/8-16 4in Ss

Product Description

The VALUE COLLECTION 781354PS is a 3/8-16 carriage bolt designed for through-bolt fastening applications that require a smooth, dome-shaped head and a square neck to resist rotation during installation. Manufactured from 18-8 stainless steel with a bright uncoated finish, this fastener offers reliable corrosion resistance in wet, outdoor, or high-humidity environments. The bolt measures 4 inches in length under the head and follows UNC (Unified National Coarse) thread standards. At 0.12 pounds per unit, it is lightweight yet strong enough for structural and mechanical assemblies requiring stainless fasteners.

This carriage bolt is suited for use in construction, HVAC equipment mounting, plumbing support structures, electrical panel framing, pool equipment installations, and general trade applications where corrosion resistance is critical. The square neck seats into pre-drilled square holes or wooden substrates to prevent spinning without the need for a secondary tool on the bolt head, making it practical for single-sided access installations. Trades including plumbers, electricians, HVAC technicians, and pool service professionals regularly use stainless carriage bolts in equipment support and framing work.

Key Features

• 18-8 stainless steel construction provides corrosion resistance in wet and outdoor environments
• 3/8-16 UNC thread for broad compatibility with standard nuts and hardware
• Square neck design prevents bolt rotation during nut tightening without a wrench on the head
• Bright uncoated finish maintains dimensional accuracy and avoids coating interference in tight clearances
• 4 inches length under head suits medium-depth through-bolt applications

Compatibility

Designed as a standard UNC carriage bolt for use with 3/8-16 hex nuts and washers in wood, metal, and composite substrates requiring a flush, round-head fastener with anti-rotation square neck.

Installation Notes

Installation is performed by inserting the bolt through a pre-drilled hole so the square neck seats firmly against the material, then threading a 3/8-16 nut from the opposite side. Tighten with a wrench or socket on the nut side only. No special certifications are required for general fastener installation, but consult applicable structural or equipment codes when used in load-bearing or code-governed assemblies. Avoid mixing stainless fasteners with dissimilar metals in highly conductive or submerged environments to minimize galvanic corrosion risk.