DIN 835 Double-ended Bolts bm=2d

DIN 835 bm=2d stud bolts, also known as stud screws or studs, have threads at both ends, and the middle screw part can be thick or thin. The main feature of this bolt is that the length (bm) of its screwed end is equal to twice its diameter (d), that is, bm=2d. This kind of stud bolts are widely used in various machinery and equipment that require fixed connections, such as mining machinery, bridges, automobiles, motorcycles, boiler steel structures, hanging towers, long-span steel structures and large buildings, etc. It is especially suitable for places where the thickness of the connecting body is large, the length of the bolt is long, thick plate connection and where it is inconvenient to use hexagonal bolt connection.

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Product drawing

Product Specification

Some introduction about our company

Application

Our products are widely used in mechanical, electrical, automotive, building construction, railways, bridges, steamships, fire protection and communication system, etc.

Workshop

Certification

Through scientific management, Jinan Star Fastener Co., Ltd. has obtained the 2015 version of ISO9001 quality management system certification. In 2017, the laboratory passed the national CNAS certification. In 2018, the company passed the European CE certification.

Testing Equipment

Our company has a specialized laboratory with digital hardness testers, microscopes, universal testing machines, axial force meters, hydrogen embrittlement detection devices, magnetic particle flaw detectors, metallographic analyzers, carbon and sulfur analyzers and salt spray testing machines, etc. Experimental testing equipment is used to conduct comprehensive testing of the chemical composition of raw materials, product hardness, mechanical properties, coating thickness and corrosion resistance to ensure that all products meet standard requirements and satisfy customers.

Production equipment

Our company has more than 300 production equipment.The product production process includes: Annealing, shot blasting, cold heading, thread rolling, heat treatment, galvanizing, finished product testing, packaging, etc. are all completed in the company.

Packing

Service

1. According to the specific needs of customers, we provide customized services for stud bolts of different specifications, lengths, materials and surface treatments.

2. Provide professional technical consultation and answer customers' questions about product selection, use and maintenance.

3. On the premise of ensuring product quality, provide fast delivery services to ensure that customers can obtain the products they need in a timely manner.

4. Provide comprehensive after-sales service, including product installation guidance, usage training, question answering, etc., to ensure that customers can use the product smoothly.

FAQ

1. How can you guarantee us the product quality?

Answer: We produce in strict accordance with DIN 835 standards and adopt advanced production processes and equipment to ensure stable and reliable product quality. At the same time, we also conduct strict quality inspections on each batch of products to ensure that the products meet standard requirements.

2. Can you provide customized services?

Answer: Yes, we provide customized services. You can choose stud bolts in different specifications, lengths, materials and surface treatments according to your needs. We will produce according to your specific needs to ensure that the product meets your requirements.

3. Can the delivery time be guaranteed?

Answer: We will develop a reasonable production plan based on your order volume and delivery requirements to ensure on-time delivery. At the same time, we will work closely with logistics companies to ensure the safety and timely arrival of products during transportation.

4. How to choose suitable stud bolts?

Answer: There are many factors to consider when choosing the appropriate stud bolt, including the material of the connection, thickness, hole diameter, etc. Our technical team can provide professional selection suggestions and technical support based on your specific needs to help you choose the appropriate stud bolts.