Conquest 5/16″ x 5″ Carriage Bolt – 316 Stainless Steel

When pairing a nut with a hex bolt, the material and finish must match. If these do not match, the nut will not fit the bolt.

The Conquest 5/16″ Carriage Bolt made from 316 stainless steel is engineered to excel in the toughest environments. Whether youre building near the coast, working with chemically treated wood, or constructing outdoor structures, this bolt offers exceptional resistance to rust and corrosion.

5/16″ 316 Stainless Steel Carriage Bolts with Corrosion-Resistant Strength

Its rounded head and square neck design ensure a flush, tamper-resistant appearance with a secure grip that prevents rotation. Ideal for both structural and decorative use in marine, industrial, or outdoor residential applications.

Key Features

• Diameter: 5/16″
• Thread Type: Coarse
• Threads Per Inch (TPI): 18
• Material: 316 Stainless Steel maximum corrosion protection
• Head Type: Round domed head with square neck
• Finish: Natural stainless for clean, polished appearance

Applications

• Dock and pier construction
• Decks, fences, and outdoor structures
• Furniture, pergolas, gazebos
• Trailer, marine, and equipment assembly
• Coastal or chemically sensitive industrial builds

Installation Tips

• Drill a clearance hole for proper neck seating.
• Insert bolt with the domed head outward; ensure neck locks into material.
• Secure from the nut side using a compatible 5/16″ 316 stainless nut and washer (sold separately).
• No need to hold the bolt headtighten only from the nut side.

California Residents: WARNING