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Home > Hot Products > China Carriage Bolt DIN603 - Quality Fasteners from Leading Suppliers & Factory, Various Materials & Grades Available
China Carriage Bolt DIN603 - Quality Fasteners from Leading Suppliers & Factory, Various Materials & Grades Available
China Carriage Bolt DIN603 - Quality Fasteners from Leading Suppliers & Factory, Various Materials & Grades Available
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China Carriage Bolt DIN603 - Quality Fasteners from Leading Suppliers & Factory, Various Materials & Grades Available
China Carriage Bolt DIN603 - Quality Fasteners from Leading Suppliers & Factory, Various Materials & Grades Available

China Carriage Bolt DIN603 - Quality Fasteners from Leading Suppliers & Factory, Various Materials & Grades Available

Discover high-quality fasteners from reputable China suppliers, with prices ranging from US $0.6 to $9.99 per piece. Our minimum order quantity is 100 pieces, and we boast a supply capability of 10,000 pieces per month. We offer various surface treatments including Plain, Zinc Plated (ZP), Galvanized, Hot Dip Galvanized, and Dacromet to meet diverse needs. Our products are crafted from durable materials such as Carbon Steel, Alloy Steel, Stainless Steel, Brass, and Copper. We adhere to multiple standards including DIN, GB, UNC, BSW, and JIS, ensuring reliability and quality. All our fasteners come with certificates such as ISO9001, ISO14001, ISO45001, and SGS, certifying their exceptional quality. Available grades include 4.8, 8.8, 10.9, 12.9, A2-70, A4-70, and A4-80, making us a trusted factory for all your fastening solutions.

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Product Description

Product nameCarriage Bolt
SizeM3-100
Length10-3000mm or as required
Grade4.8 / 8.8 / 10.9 / 12.9
MaterialSteel / 35k / 45 / 40Cr / 35Crmo
Surface treatmentPlain / Black / Zinc / HDG
StandardDIN / ISO
CertificateISO 9001
SampleFree Samples
Definition and Basic Structure

A galvanized screw is a transmission component coated with a zinc layer (electroplated zinc or hot-dip zinc) on the surface of the screw. It is primarily used to convert rotational motion into linear motion while offering reliable anti-corrosion capability.

• Base Material: Usually carbon steel (such as 45# steel, 40Cr) or stainless steel, with a zinc layer covering the surface after galvanizing.

• Thread Type: Commonly trapezoidal thread (Tr type) or ball screw; the latter is mostly used in high-precision scenarios.

• Galvanizing Process: Divided into electroplated zinc (thin and uniform coating) and hot-dip zinc (thick coating, strong corrosion resistance).

Characteristics of Galvanizing Process
Electroplated Zinc

Thickness: 5–20 μm

Corrosion Resistance: General

Applicable: Indoor equipment, low corrosion environments

Cost: Low

Hot-Dip Galvanizing

Thickness: 50–150 μm

Corrosion Resistance: Excellent

Applicable: Outdoor, marine, and chemical environments

Cost: Medium

Core Advantages
Corrosion Resistance: Suitable for humid, salt spray, acidic and alkaline environments.
Economy: Lower cost than stainless steel with significantly extended lifespan.
Low Maintenance: Self-healing zinc layer reduces the need for frequent maintenance.
Adaptability: Compatible with various stepper and servo motor systems.
Application Scenarios
  • Outdoor Machinery: Construction and agricultural equipment exposed to rain and soil.
  • Ship & Ocean Engineering: Deck lifting mechanisms and valve controls resistant to salt spray.
  • Chemical Equipment: Reaction kettle transmission systems and pipeline devices.
  • Construction Industry: Automatic doors, windows, and lifting platforms.
  • Food Processing: Smooth, rust-free surfaces meeting hygiene standards.
Carriage Bolt Galvanized Screw
Frequently Asked Questions
1 What is the difference between electroplated and hot-dip galvanized bolts?
Electroplated zinc bolts have a thinner coating (5–20 μm) for indoor use. Hot-dip galvanized bolts have a thicker coating (50–150 μm), offering superior corrosion resistance for outdoor and marine environments.
2 What grades are available for these galvanized bolts?
They are available in grades 4.8, 8.8, 10.9, and 12.9 to meet various structural and mechanical strength requirements.
3 What materials are used in manufacturing?
The bolts are manufactured using high-quality carbon steel, including 35k, 45 steel, 40Cr, and 35CrMo, ensuring durability and mechanical performance.
4 Are they suitable for high-corrosion marine environments?
Yes, hot-dip galvanized carriage bolts are specifically recommended for marine use as they effectively resist salt spray and moisture over long periods.
5 What international standards do these bolts comply with?
Our carriage bolts comply with DIN and ISO international standards, ensuring global compatibility and quality assurance.
6 Can I request samples before placing a bulk order?
Yes, free samples are available to verify specifications, surface treatment quality, and dimensional accuracy before committing to production.

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