Description
The 304 Stainless Steel DIN603 Round Head Square Neck Bolt is a high-quality fastener engineered for secure, non-rotating fastening in diverse structural and mechanical applications. Commonly known as a carriage bolt, this unique design features a large half-round head and a square neck underneath. The smooth, rounded head provides an aesthetically pleasing finish, while the square neck ensures strong anti-rotation performance - making installation easier, faster, and more secure.
Crafted from premium 304 stainless steel, this fastener offers exceptional resistance to corrosion, rust, and oxidation, making it ideal for both indoor and outdoor use, even in harsh and humid environments. Designed to meet DIN603 standards, it delivers consistent quality and long service life for medium to heavy-duty fastening tasks.
Features & Benefits
- Superior Corrosion Resistance: Made from 304 stainless steel, this bolt offers excellent resistance to rust, corrosion, and oxidation, even in humid or wet environments.
- Durability and Strength: Designed for heavy-duty use, the large half-round head and square neck provide a strong hold and prevent slippage during installation. It ensures secure fastening for a variety of projects.
- High Wear Resistance: The bolt's high wear resistance makes it perfect for applications that require long-lasting performance and durability under stress or heavy use.
- Easy Installation: The square neck prevents rotation, making it easier to install compared to regular bolts, providing a more secure and efficient fastening solution.
Specification
There are tolerances in this product, the size is subject to the actual object, please be careful to shoot!
Size unit: mm
|
Gauge lattice |
M6 |
M8 |
M10 |
M12 |
|
|
pitch |
1 |
1.25 |
1.5 |
1.75 |
|
|
Head diameter |
dk max |
16.55 |
20.65 |
24.65 |
30.65 |
|
dk min |
15.45 |
19.35 |
23.35 |
29.35 |
|
|
Square neck thickness |
k1 max |
4.6 |
5.6 |
6.6 |
8.75 |
|
k1 min |
3.4 |
4.4 |
5.4 |
7.25 |
|
|
Head thickness |
k max |
3.88 |
4.88 |
5.38 |
6.95 |
|
k min |
3.12 |
4.12 |
4.62 |
6.05 |
|
|
Square neck to side |
s max |
6.48 |
8.58 |
10.58 |
12.7 |
|
s min |
5.52 |
7.42 |
9.42 |
11.3 |
|
FAQ:
Q1: What is a Round Head Square Neck Bolt used for?
A: It is used for structural, woodworking, and mechanical assemblies where a secure, anti-rotation fastening is required.
Q2: How does the square neck help during installation?
A: The square neck is designed to lock into the material (typically wood or soft metal) as the bolt is inserted. This prevents the entire carriage bolt from spinning, allowing the installer to easily tighten the nut without needing a separate tool to hold the bolt head.
Q3: Is this Round Head Square Neck Bolt suitable for outdoor projects?
A: Yes. Since it is made from 304 stainless steel, it is highly resistant to corrosion and oxidation, making it suitable for both indoor and outdoor use, even in tough environments.
Q4: Can this bolt be used for heavy-duty applications?
A: Yes. This fastener is designed for heavy-duty use and provides a strong hold, ensuring secure fastening for a variety of construction, mechanical, and structural applications.




