Products Description
The carriage bolt, also known as a round head square neck bolt, is a fastener designed for use in fastening situations where aesthetics and security are required. It is unique in that the lower part of the head has a square neck section. When it is screwed into wood or the nuts and parts that go with it, this square section is embedded in the material, preventing the bolt from rotating, thus ensuring a secure and stable connection. In addition, the rounded head design allows the carriage bolt to be better embedded in wood or other soft materials, reducing damage to surfaces and providing a smoother top that won't scratch contacting objects or pose a safety hazard.
Parameter
|
Standard |
DIN603 |
|
Name |
Carriage bolts |
|
Material |
carbon steel, alloy steel, etc. |
|
Grade |
4.8 grade, 5.8 grade, 8.8 grade, etc. |
|
Nominal Diameter |
M2-M48 |
|
Pitch |
0.4-5 |
|
Surface treatment |
ZP,YZ,BLACK |
|
Alias |
Round head square neck bolts |
Application of Carriage Bolts
Wooden furniture
Carriage bolts are commonly used to connect parts such as bed frames, tables and chairs. Its head is specially shaped and easy to tighten, which can easily fix the furniture.
Carriage and Vehicle Accessories
It can be used in automobiles, mechanical equipment and other spare parts to provide a solid connection to ensure the safety and reliability of vehicles and mechanical equipment.
Mechanical equipment assembly
In the working environment of mechanical equipment, carriage bolts can provide a reliable connection to ensure the normal operation and stability of the equipment.
Product Packaging
Why Choose Us
We are always at your service when you need
We supply standard-compliant, high-strength, anti-corrosion carriage bolts with full-size options, strict quality inspection, factory-direct pricing and tailored customization to secure stable, cost-effective fastening for your projects.
FAQ
Q: What standard do these carriage bolts follow?
A: Strictly produced to DIN603 standard, also called round head square neck bolts.
Q: What materials are available?
A: Carbon steel and alloy steel for different load strength requirements.
Q: What strength grades can I choose?
A: 4.8, 5.8, 8.8 high tensile strength grades in stock.
Q: What size range do you supply?
A: Nominal diameter M2–M48, thread pitch 0.4–5 for full specification coverage.
Q: Why do carriage bolts have square neck design?
A: Square neck locks into mounting hole to stop bolt spinning during tightening.
Q: Are outdoor anti-rust options available?
A: ZP and YZ finishes deliver reliable rust resistance for outdoor exposure.
Q: Can non-standard sizes and custom lengths be made?
A: Custom dimensions, special threads and tailored lengths are supported.
Q: Can samples and bulk orders be arranged?
A: Small trial samples and large bulk wholesale orders are both acceptable.
Q: Can material and strength certification be provided?
A: Factory test reports and material certificates are available upon request.
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