Product Name
DomeHead Square Neck Carriage Bolt
Product Description
A classic fastener combining a smooth dome head with an integrated square neck. Installs flush into countersunk holes for clean, snag-free surfaces. The square shoulder grips the material during tightening, preventing spinning and allowing single-wrench installation.
Product Specification
One-piece bolt with rounded head and square under-head section. Designed for pre-drilled countersunk holes. Requires only one wrench for fastening. Available in multiple materials for various applications.
Key Product Parameters
| Parameter | Specification | |
|---|---|---|
| Sizes | 1/4" to 3/4" | 6mm to 20mm |
| Lengths | 1" to 8" | 25mm to 200mm |
| Head Type | Low Dome Countersunk | |
| Neck Type | Square (Anti-Spin) | |
| Thread | Coarse / Full Length | |
| Materials | Carbon Steel, Stainless 304/316 | |
| Finishes | Plain, Zinc, Hot-Dip Galvanized | |
| Nut Required | Hex Nut (Sold Separately) | |
| Standards | DIN 603, ASME B18.5 |
Product Applications
Ideal for connections needing strength and a clean look.
Wood Structures: Beams, posts, timber framing.
Decking: Boardwalks, decks, railings.
Playgrounds: Slides, swings, safety surfaces.
Marine: Docks, piers, boat ramps.
Furniture: Benches, tables, outdoor seating.
Fencing: Gates, agricultural enclosures.
Product Advantages
Designed for simpler, safer, better-looking connections.
Single-Wrench Work: Square neck locks in place, no need to hold the head.
Clean Finish: Dome head sits flush for a professional look.
Safer Surfaces: No protruding edges to catch clothing or skin.
Stays Put: Square neck prevents spinning from vibration.
Weather Ready: Multiple finishes for indoor, outdoor, or marine use.
Multi-Material: Works in wood, composites, and soft metals.
Product Features
Practical design elements for reliable everyday use.
Square Anti-Spin Neck: Embeds into material, keeps bolt from turning.
Smooth Dome Head: Low profile, flush fit, snag-free.
Full Threading: Complete thread length for strong nut engagement.
Countersunk Profile: Matches standard drill bits for flush install.
Rust Protection: Zinc or galvanized options for outdoor life.
Universal Fit: Standard sizes work with common nuts and washers
![]()
FAQ
1. Are you trading company or manufacturer ?
We are manufacturer ,You can see the Alibaba certification.
2. How long is your delivery time?
Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.
3. Do you provide samples ? is it free or extra ?
Yes, we could offer the sample for free charge but need pay the cost of freight.
4. What is your terms of payment ?
Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.