What are Shoulder Screws?

Hex Socket Head Cap Screws are also called Hex Socket Head Screws. Its head is a hexagonal head and also a cylindrical head. There are stainless steel and iron according to material. Stainless steel has stainless steel SUS202 hex socket head screws. This is a stainless steel common material. There are stainless steel SUS304 hex socket head screws and stainless steel SUS316 hex socket head screws. According to the strength grade of the hexagon socket head screws of iron, there are 4.8 grade hexagon socket head screws, 8.8 grade hexagon socket head screws, 10.9 grade hexagon socket head screws, and 12.9 grade hexagon socket head screws. 8.8-12.9 grade hexagon socket head screws are called high strength and high grade hexagon socket screws.

StandardTitle in Chinese: Hex Socket Head Cap Screws

English standard name: Hexagon socket head shoulder screws

Release Date IssueDate: 1985-8-1

ExecuteDate: 1986-6-1

Hexagon socket head shoulder screw according to the hardness of the screw wire, carrying tension,

The national standard of the hexagon socket head shoulder screw is the national standard GB / T 5281-1985. There are many specifications. The commonly used specifications are 3 * 8, 3 * 10, 3 * 12, 3 * 16, 3 * 20 , 3 * 25, 3 * 30, 3 * 45, 4 * 8, 4 * 10, 4 * 12, 4 * 16, 4 * 20, 4 * 25, 4 * 30, 4 * 35, 4 * 45, 5 * 10, 5 * 12, 5 * 16, 5 * 20, 5 * 25, 6 * 12, 6 * 14, 6 * 16, 6 * 25, 8 * 14, 8 * 16, 8 * 20, 8 * 25 , 8 * 30, 8 * 35, 8 * 40, etc. ^[2]