Specifications of DIN603 Round Head Carriage Bolts
Specification | Details |
Model No. | DIN603 Round Head Carriage Bolts |
Material | Carbon Steel, Alloy Steel,Stainless Steel |
Head Type | Round Head |
Standard | DIN603 |
Grade | 4.8,6.8,8.8,10.9,12.9，A2-70,A4-70,A4-80 |
Finish Options | Plain,Black,Galvanized,H.D.G,YZP,Dacromet,Polishing |
Thread Length | Full Thread or Half Thread |
Connection | Common Bolt |
Certificate | ISO9001:2015 |
Package Dimensions | 25kgs/Carton put to 900kgs/Pallet |
Origin | Ningbo, Zhejiang |
HS Code | 7318150000 |
Head mark | According to customer requirements |
Delivery Time | 45-60 days |
What are the characteristics of a carriage bolt?
1、Round head design: no cross slot or hexagonal structure, avoids hooking and has anti-theft function;
Square neck structure: located below the round head, embedded in the material hole during installation to prevent the bolt from rotating;
2、Threaded rod: full thread or partial thread to meet different fastening requirements.
What are the classifications and standards of carriage bolts?
According to the head size and standard, they are divided into two categories:
1、Large semicircular head carriage bolts: corresponding to the standards GB/T14 and DIN603;
2、Small semicircular head carriage bolts: corresponding to the standards GB/T12-85
How Are Carriage Bolts Manufactured?
Material selection and pretreatment
1、Material selection: Commonly used stainless steel, carbon steel or alloy steel.
2、Head forming: Use a cold heading machine to stamp, forge or extrude the material through a die to form the bolt head and square neck at one time.
3、Thread processing：
a、Thread rolling: Rolling the threaded plate to ensure thread accuracy and matching.
b、Rolling process: Replace traditional cutting to improve thread strength and fatigue resistance.
4、Heat treatment (for high-strength bolts)
Quenching + tempering high-strength bolts such as grade 8.8 and grade 10.9 to optimize mechanical properties (such as tensile strength and durability)3.
Surface treatment
5、Anti-corrosion treatment: Select galvanizing, Dacromet, chrome plating or polishing process according to the use environment.
Cleaning and polishing: Remove processing residues to ensure surface finish and avoid thread deformation
Quality Inspection
6、Dimension Inspection: Use tools such as go/no-go gauges and calipers to check thread matching and tolerance4.
Performance Testing: Including tensile strength, torque testing, corrosion resistance, etc.
How to install carriage bolts?
Installation steps:
① Pre-drill holes to match the square neck size;
② Knock in the bolts to make the square neck snap in;
③ Tighten the nuts and use the anti-loosening washers .
What are the application scenarios of carriage bolts?
1、Architecture and infrastructure
2、Machinery and transportation
3、Furniture and home
What Makes Topbolt Metalworks Unique?
We combine advanced technology, reliable quality systems, and a customer-first philosophy to provide the best carriage bolts for every project. Work with us to experience unmatched reliability and expertise.
Contact Topbolt Metalworks
Looking for heavy hex bolts tailored to your project? We at Topbolt Metalworks are here to provide expert guidance, high-quality products, and exceptional service. Contact us today to get started:
Sales Office: ROOM1-3, No.34 Building 5, Eastern Business Centre, Jiangdong District, Ningbo, China
Factory Location: Yuyan, Xiepu Chemical Industrial Zone, Zhenhai District, Ningbo, China
Tel: +86-574-86595122
Fax: +86-574-86657066
Email: sales2@topboltmfg.com
If you want to know more about our products or have purchasing needs, please contact us. Our team is committed to providing you with the best solutions and the most competitive quotations, and we look forward to our cooperation.
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