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Carriage Bolts | Round Head Square Neck Bolts

Bolts

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Carriage Bolts | Round Head Square Neck Bolts

Hebei Chudu Metal Products Co., Ltd. is a professional manufacturer and exporter of fasteners, including carriage bolts, with over 10 years of experience in production and global supply. Our carriage bolts are widely used in woodworking, metal connections, construction, and mechanical industries. We provide both standard and customized solutions to meet different customer needs.

  • Product Name Carriage Bolt (Round Head Square Neck Bolt)
  • Standards DIN 603, ASME B18.5, ISO 8677, or customized
  • Material Carbon Steel, Stainless Steel (SS304, SS316), Alloy Steel
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Product Information
YDQ_3153_61
YDQ_3162_63
YDQ_3160_62

Product Overview

Product Name

Carriage Bolt (Round Head Square Neck Bolt)

Standards

DIN 603, ASME B18.5, ISO 8677, or customized

Material

Carbon Steel, Stainless Steel (SS304, SS316), Alloy Steel

Grade

4.8, 6.8, 8.8, 10.9, A2-70, A4-80

Surface Finish

Zinc Plated (Blue / Yellow)

Hot Dip Galvanized (HDG)

Black Oxide

Dacromet / Ruspert

Plain / Oiled

Thread Type

Full Thread / Partial Thread, Metric / UNC / UNF

Size Range

Metric: M5 – M24, Length 10mm – 300mm

Inch: 1/4" – 1", Length 3/4" – 12"

Customized sizes available

Product Features

  • 3-4icon_ (10)
    Round, dome-shaped head for smooth surface and safe use
  • 3-4icon_ (9)
    Square neck design prevents bolt from turning during tightening
  • Excellent corrosion resistance for indoor and outdoor applications (2)
    Excellent corrosion resistance for indoor and outdoor applications
  • Corrosion-resistant coatings for long-term use’
    Strong holding power for heavy-duty assemblies
  • Easy to install and compatible with standard boltsnuts
    Easy to install with a single tool from the nut side
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Applications

  • Wood-to-wood and wood-to-metal joints

    Wood-to-wood and wood-to-metal joints

  • Installing handrails and guardrails

    Fencing, decking, and outdoor wooden structures

  • Construction

    Construction and building projects

  • Machinery and equipment fastening

    Machinery and equipment fastening

  • Automotive (2)

    Automotive and agricultural industries

  • Tensioning rods in bridges and towers

    Bridges, railways, and public infrastructure

Packaging & Delivery

Packaging

Bulk in cartons + pallets
Small boxes, color boxes, customized labels with log

Lead Time

7–30 days depending on quantity and specifications

Shipping Port

Tianjin, China

Why Choose Hebei Chudu

Factory-direct supply with competitive prices.
Full production line and stable quality control.
Fast delivery and flexible order quantities.
OEM / ODM services for custom needs.
Certified by ISO 9001 with SGS and ROHS compliance.
Professional foreign trade team with efficient communication.

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