Value Collection 781198PR Carriage Bolt 5/16-18 1-3/4 in

Product Description

The VALUE COLLECTION 781198PR is a 5/16-18 carriage bolt with a 1-3/4-inch length under head and a square neck drive design. Manufactured from 18-8 stainless steel with a bright uncoated finish, this fastener provides reliable corrosion resistance in both indoor and outdoor installations. The square neck beneath the domed head resists rotation when drawn into wood or composite substrates, eliminating the need for a wrench on the bolt end. Electricians, plumbers, HVAC technicians, and general trade contractors reach for carriage bolts when securing equipment supports, strut channel assemblies, hangers, and mechanical brackets.

This bolt is suited for light structural and equipment-mounting applications where a smooth, tamper-resistant head profile is required. Common uses include securing pipe hangers, equipment pads, wood framing connections, and support structures in mechanical rooms and utility spaces. The 5/16-18 UNC thread pitch is a standard size that mates with widely available hex nuts, flange nuts, and coupling nuts. The uncoated 18-8 stainless steel construction makes it appropriate for damp or mildly corrosive environments without the need for additional protective coatings.

Key Features

• 5/16-18 UNC thread for broad nut and hardware compatibility
• 1-3/4-inch length under head suits medium-thickness substrate connections
• Square neck locks bolt in place against wood and soft substrates, preventing spin during tightening
• 18-8 stainless steel construction resists rust and mild chemical exposure
• Bright uncoated finish maintains dimensional accuracy and clean appearance
• Rounded dome head provides a smooth, snag-free surface on the exposed side

Compatibility

Designed as a standard 5/16-18 UNC carriage bolt for use with matching hex nuts, flat washers, and lock washers in mechanical, plumbing, and electrical support applications.

Installation Notes

Installation typically requires a standard wrench or socket on the mating nut only — the square neck seats into the substrate to hold the bolt stationary. Ensure the receiving material is soft enough to accept the square neck fully before applying torque to the nut. Power down or de-energize any adjacent electrical equipment before working in panel or equipment-room environments. Follow applicable local building and mechanical codes for fastener grade and spacing requirements in structural connections.