PRODUCTRound Head Square Neck Carriage Bolt DIN 603 Carbon Steel Grade 4.8 Fastener for Wood Construction and Furniture
DIN 603 carriage bolts feature a smooth round head, a square neck, and a threaded shank for nut fastening. Made from carbon steel in Grade 4.8, they are available in diameters from M3 to M12 and lengths from 8 mm to 100 mm. The square neck helps resist rotation during tightening when properly engaged with the connected material or a matching square opening. Typical applications include wood construction, furniture assembly, guardrails, and container fittings.
- Standard
- DIN 603
- Strength grade
- Grade 4.8
- Material
- Carbon steel
Product Details
The DIN 603 Carriage Bolt is designed with a smooth round head, a square neck beneath the head, and a threaded shank for nut fastening. Made from carbon steel and available in Grade 4.8, it is suitable for a range of wood construction and furniture assembly applications.
The square neck is designed to engage with the connected material or a matching square hole, helping resist bolt rotation while the nut is tightened. With metric diameters from M3 to M12 and lengths from 8 mm to 100 mm, this carriage bolt supports different fastening requirements. Buyers can specify the required diameter, length, quantity, and finish when requesting a quotation.
Key Features
DIN 603 design: Round head and square neck configuration for carriage-bolt applications.
Carbon steel: A practical material option for general fastening and assembly.
Grade 4.8: Suitable for applications specified for this strength grade.
Multiple size options: Diameter range from M3 to M12 and length range from 8 mm to 100 mm.
Wood-focused applications: Intended for wood construction, furniture assembly, and related fastening work.
Project-based specification: Buyers can submit their size and order requirements for quotation.
Product Structure and Fastening Function
A carriage bolt has three main sections: the round head, the square neck, and the threaded shank. The smooth round head provides a finished appearance on the exposed side of the connection. The square neck sits directly beneath the head and is designed to engage with the material or a matching square opening, helping keep the bolt from turning as a nut is tightened from the other side.
For wood assemblies, the square neck may grip into the wood as the connection is tightened. The actual fit and holding behavior depend on the material, hole preparation, and assembly design. For connections involving metal components, the hole and mating parts should be suitable for the square neck.
Applications
DIN 603 Carriage Bolts can be used in applications such as:
Wood construction and timber connections
Furniture frames and wooden furniture assembly
Wood-to-wood fastening
Wood-to-metal connections where the assembly design is suitable
Fences, guardrails, and other general construction assemblies
Select the bolt diameter and length according to the materials being joined, the thickness of the connected parts, and the required thread engagement.
Product Specifications
| Item | Specification |
|---|---|
| Product name | Round Head Square Neck Carriage Bolt |
| Standard | DIN 603 |
| Material | Carbon steel |
| Strength grade | Grade 4.8 |
| Head style | Round head |
| Neck style | Square neck |
| Diameter range | M3–M12 |
| Length range | 8–100 mm |
| Typical applications | Wood construction, guardrails, containers, and furniture assembly |
| Surface finish | Confirm according to order requirements |
| Packaging | Confirm according to order requirements |
Size Selection and Ordering Information
When requesting a quotation, please provide the required diameter, length, order quantity, and application. If you have a preferred surface finish, packaging method, or drawing, include those details in your inquiry. This helps the supplier check the appropriate product configuration and prepare a quotation for your project.
For furniture and wood construction, consider the material thickness and the required protruding thread length when selecting the bolt length. The final size should be checked against the connection design and the nut or other mating components being used.
Frequently Asked Questions
1.What is a DIN 603 carriage bolt?
It is a bolt with a round head and a square neck beneath the head, designed for fastening applications where the neck can engage with the connected material or a matching square opening.
2.What material and strength grade are specified for this product?
This product is specified as carbon steel, Grade 4.8.
3.What sizes are available?
The provided size range is M3–M12 in diameter and 8–100 mm in length.
4.Can this carriage bolt be used for furniture assembly?
Yes. Furniture assembly is one of the intended application areas. Choose the size according to the furniture design, connected material thickness, and fastening requirements.
5.Is a surface finish specified?
The provided product information does not specify a finish for this item. Please include your finish requirement when requesting a quotation.
6.What information should I provide for a quote?
Please provide the diameter, length, quantity, intended application, and any surface finish or packaging requirements.
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