5/16 in. x 4-1/2 in. Zinc Carriage Bolts (50-Pack)

Durable zinc-plated steel carriage bolts for fastening wood to wood or metal with a smooth, low-profile head. The square shoulder locks into the material to prevent spinning, delivering a clean, semi-flush finish for carts, fences, and general projects.

Key Features:

• Multi-Material Use: Securely fastens wood to wood or metal frames
• Low-Profile Head: Smooth, domed head sits semi-flush for a clean look in tight spaces
• Spin-Free Installation: Square shoulder bites into wood to prevent bolt rotation—no flat washer needed
• Corrosion Resistance: Zinc plating provides moderate protection against rust for indoor/outdoor projects
• Project Ready Pack: 50 pieces for consistent sizing across larger builds

Specifications Table:

Frequently Asked Questions (FAQ):

Q: What size drill bit should I use?
A: Pre-drill a hole that matches the 5/16 in. bolt diameter for best results.

Q: Are nuts included?
A: Nuts are typically sold separately; verify your kit contents before purchasing.

Q: Can these be used outdoors?
A: Zinc plating offers moderate corrosion resistance and is suitable for many outdoor applications, but for harsh or coastal environments consider hot-dipped galvanized or stainless steel.

Q: What tools are required for installation?
A: Insert the square shoulder into the pre-drilled hole and tighten a nut on the opposite side with a wrench; the domed head does not require a driver.

Q: What is the thread type?
A: 5/16 in.-18 coarse threads.

A Clean, Domed Detail for Honest, Functional Joinery

There’s a quiet elegance in the soft dome of a carriage bolt—it punctuates woodwork with a subtle, crafted note. The square shoulder locks into timber, keeping the surface pristine while delivering reliable strength. Try them along a garden cart or a reclaimed fence panel for a streamlined, intentional accent. Functional and refined, they’re a small luxury that elevates everyday builds.

Outfit your next project with these reliable zinc carriage bolts and enjoy clean looks with lasting hold—add the 50-pack to your cart now.