Value Collection 93315 Carriage Bolt 5/16-18 3in Square Neck Ss

Product Description

The VALUE COLLECTION 93315 is a 5/16-18 carriage bolt with a 3-inch length under head, designed for secure fastening in structural and mechanical applications. The square neck beneath the domed head locks into wood or punched-hole substrates, preventing rotation during nut tightening without the need for a wrench on the bolt side. Manufactured from Grade 18-8 stainless steel with an uncoated finish, this bolt resists corrosion in wet and outdoor environments. It follows Unified National Coarse (UNC) thread standards and is measured in the inch system. Tradespeople working in plumbing, pool equipment mounting, or light structural assemblies will find this a reliable hardware choice.

This carriage bolt suits residential and light commercial fastening tasks where corrosion resistance matters, such as securing equipment supports, dock hardware, fence components, or pool and spa equipment frames. The 5/16-18 UNC thread size is a common standard in trade applications and mates with standard hex nuts and washers of the same thread designation. No specific model compatibility data was provided; consult your project specs for applicable hardware requirements.

Key Features

• 5/16-18 UNC thread for compatibility with standard hardware
• 3-inch length under head for medium-depth fastening applications
• Square neck locks bolt in place, preventing rotation without a secondary tool
• Grade 18-8 stainless steel construction for corrosion resistance
• Uncoated finish — no plating to flake or delaminate over time
• Inch measurement system, UNC thread standard

Compatibility

Designed as a standard 5/16-18 UNC carriage bolt suitable for use with matching hex nuts, washers, and threaded inserts in wood, metal, or composite substrates where an anti-rotation square neck profile is required.

Installation Notes

Installation is typically performed by a carpenter, plumber, electrician, or general tradesperson depending on the application. Insert the bolt through the pre-drilled hole so the square neck seats firmly into the substrate, then thread a nut and washer onto the exposed end. Power down or de-energize any associated equipment before securing mounting hardware. Do not exceed the torque rating of the stainless steel fastener, as over-torquing Grade 18-8 stainless can cause galling on the threads.