Cup Head Square Neck Bolts GB 12

 The semicircular head square neck bolt GB 12 is a specially designed bolt, mainly used in high-strength fastening occasions. The head is made into a semi-spherical shape, which makes the head smoother and not easy to hook other objects. A square neck is made under the head. This design ensures that when the bolt is screwed on the nut, the bolt will not rotate due to the square neck, which increases the stability of the connection. Because its head is semicircular and there is no groove or hexagon socket design that can be used as a power tool, it can also play an anti-theft role in the actual connection process. Due to its special design and high strength, the semicircular head square neck bolt GB 12 is widely used in occasions that require high-strength fastening, such as automobiles, textile machines, flour machines, lifeboats, etc.

Pictures

Product drawing

Product Specification

Some introduction about our company

Application

Jinan Star Company specializes in the production of fastener products. Our bolts, nuts and other products are widely used in machinery, railways, automobiles, construction, electrical, bridges, communications, firefighting and other industries.

Certification

Jinan Star Fastener Co., Ltd. has obtained the 2015 version of ISO9001 quality management system certification through the scientific management of leaders of various departments and the pursuit of high quality for bolts and other fasteners. In addition, the laboratory owned by Star Company has obtained the certification in 2017. It passed the national CNAS certification in 2018, and the company passed the European CE certification in 2018.

Workshop

The workshop of Jinan Star Fastener Co., Ltd. is the core area of the company's production and manufacturing, with advanced production equipment. The reasonable layout of the workshop and the scientific production process ensure the efficient production and high-quality output of fastener products.

Testing Equipment

Jinan Star Fastener Company attaches great importance to product quality and is equipped with complete quality inspection equipment, such as tensile testing machines, torque testers,metallographic microscopes, optical projectors, salt spray test chambers, coating thickness gauges, etc., which are used to test the tensile strength and elongation of fastener products and evaluate the mechanical properties of products. These equipment ensure that every link from raw materials to finished products can be strictly controlled in quality.

Production equipment

In order to meet the needs of different customers, the company has introduced a series of advanced production equipment, such as multi-station cold heading machines, thread rolling equipment, heat treatment equipment, shot blasting machines, sand blasting machines, electroplating lines and other surface treatment equipment, and fully automatic packaging equipment. These equipment not only improve production efficiency, but also ensure the consistency and stability of product quality.

Packing

Service

1.Product production: The primary service of bolt manufacturers is the production of various types of bolt products. For example, steel structure bolts, anchor bolts, high-strength bolts, etc. These products are widely used in construction, machinery, transportation and other fields. Manufacturers will produce according to customer needs and in accordance with national standards or industry standards.

2. We provide high-quality services to ensure that products can be safely and efficiently transported from the manufacturer to your required destination, and comply with relevant international trade regulations and standards.

3. Our company will also negotiate with customers on contract terms such as price, delivery time, etc. to ensure that the interests of both parties are protected.

4. High cost performance: a wide selection of parts, supplied by professional factories, with competitive prices.

5. Customized services: In addition to standard products, bolt manufacturers can also provide customized services. According to the special needs of customers, such as specific size, material, performance, etc., manufacturers can customize and produce bolt products that meet the requirements.

FAQ

1. How do you control the quality?

We require QC to inspect every production link of each batch of goods. After the goods are completed, we can provide you with MTC and factory certificate.

2. Do you accept small orders?

Of course, we can accept any order and we keep large stocks of all products.

3. Please send catalog?

If you need a catalog, you can leave us your email and we will send the catalog within 2 working hours.