5/16 in. x 2-1/2 in. Zinc Carriage Bolts (100-Pack)

These Hillman carriage bolts fasten a wood face to wood or metal while providing a smooth, low-profile domed head. Zinc-plated steel offers moderate corrosion resistance, ideal for indoor or sheltered outdoor projects.

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Key Features:

• Multi-Material Use: Fastens wood to wood or metal for versatile builds and repairs
• Low-Profile Head: Smooth, domed head delivers a semi-flush, snag-free finish
• Washer-Free Locking: Square shoulder grips material to prevent bolt spin during tightening
• Corrosion Resistance: Zinc-plated steel provides moderate protection against rust
• Project-Ready Pack: 100 pieces sized 5/16 in. diameter x 2-1/2 in. length

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Specifications Table:

Specification	Details
Diameter	5/16 in.
Length	2-1/2 in.
Thread	5/16-18 (coarse)
Material	Steel
Finish	Zinc-plated
Head Type	Domed carriage head
Shoulder	Square shoulder locks into material
Package Quantity	100 pieces per retail package
Intended Use	Fasten a wood face to wood or metal
Pre-Drilling	Recommended; hole size to match bolt diameter

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Frequently Asked Questions (FAQ):

Q: Do I need to pre-drill?
A: Yes. Drill a hole matching the 5/16 in. bolt diameter for best results.

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Q: Are nuts and washers included?
A: This listing is for carriage bolts only; nuts/washers are typically sold separately.

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

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Q: What tools are needed for installation?
A: Insert the bolt through the pre-drilled hole; hold the domed head in place as the square shoulder bites, then tighten a matching nut with a wrench from the opposite side.

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Q: What is the thread size?
A: These are 5/16 in. diameter bolts; the box image indicates 5/16-18 coarse threads.

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Streamlined Hardware with a Purposeful, Polished Finish

A row of these domed carriage heads reads as clean, quiet jewelry for utilitarian woodwork. The softly rounded profile sits nearly flush, taming visual noise while adding a subtle glint of zinc. Use them to unify benches, garden carts, or utility shelving for a cohesive, crafted look. Simple, sturdy, and impeccably neat—an easy essential for elevated everyday builds.

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Equip your next project with these durable zinc carriage bolts for a clean, secure, and professional finish—add the 100-pack to your cart now.