M4 M6 M8 Plastic Star Knob Adjustment Height Screws

The standard of handle bolt mainly includes the requirements of material, size and tolerance, appearance and so on.

Material requirement

The material of the handle bolt should comply with the provisions of 06Cr19Ni10 in the GB/T 3280-2007 standard, which means that the chemical composition, hardness and corrosion resistance of the bolt should meet the specific standards.

Dimensions and tolerances

The thread of the handle bolt shall conform to the standard of GB/T 193-2003 Series 1 coarse thread, with a thread tolerance of 6g. Other dimensions and tolerances shall conform to the drawing requirements.

Appearance requirement

The outer surface of the handle should be clean and bright, free from stains and oil stains.

The outer surface of the handle should be flat, free of bumps, deformations, scratches and cracks.

The inner edge of the handle should be free from burrs and deformations.

There should be no welding cracks, slag inclusion, non-fusion and non-penetration defects at the welding point between the handle and the screw.

The welding point of the handle and screw should be able to withstand 30N·m torque without damage.

Inspection rule

The handle bolt must be inspected by the quality inspection department of the company before leaving the factory, and the product certificate is attached.

WHY CHOOSE US

Strong production capacity

Annual production of about 1.3 million units, strong production strength, and fast supply

Strict testing at every level to ensure the high quality, high safety, and high environmental protection of every product

Strict quality control

Strict testing at every level to ensure the high quality, high safety, and high environmental protection of every product

A professional after-sales service system allows you to receive not only

It's a collaboration

Comprehensive after-sales service

A professional after-sales service system allows you to receive not only

It's a collaboration

About Us

Hebei Shangfeng Import and Export Co., Ltd. is a strong production enterprise that integrates production and sales. The company is located in the standard parts production base in Yongnian District, Handan City, known as the hometown of fasteners in China. Since its establishment, it has always adhered to the business philosophy of "valuing reputation, seeking common development; seeking win-win, sharing success", conscientiously fulfilling contracts, being a trustworthy enterprise, having a good market reputation, and operating with integrity, winning numerous customers. With professional level and mature technology in the field of automation, it has rapidly risen in the field of industrial control. The company has a complete, scientific, and quality management system. The company has multiple production equipment and testing instruments. The company mainly deals in fasteners such as No. 5 tail drill tail screws, extended tail drill screws, external hexagonal bolts, tensile and internal explosions, joint nuts, car repair geckos, lead screws, nuts, integrated nails, tank nets, anchor bolts, rivet nuts, rivet nuts, etc. The products are sold in the domestic market and exported to multiple countries and regions. Welcome friends from all walks of life to guide, visit and negotiate business.