Company News
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The main differences between grade 10.9 and 12.9 bolts are as follows
1. Material composition: Alloy materials commonly used for grade 12.9 bolts are more complex and high-quality than grade 10.9 to meet higher strength requirements. 2. Strength performance: The tensile strength and yield strength of grade 12.9 bolts are significantly higher than those of gr...Read more -
What are the hardness testing standards for high-strength bolts
The hardness testing standards for high-strength bolts usually follow the national standard GB/T 3098.1-2010 Mechanical Properties of Fasteners – Bolts, Screws, and Studs. According to this standard, the determination of bolt hardness should be carried out at the head, end, or rod. The comm...Read more -
Performance requirements for hexagonal cylindrical head bolts
1. The nominal tensile strength of bolt material reaches 400MPa level; 2. The yield strength ratio of bolt material is 0.6; The nominal yield strength of bolt material reaches 400 × 0.6=240MPa level. Performance grade 10.9 high-strength bolts, after heat treatment, can achieve: 1. The nominal ten...Read more -
Basic parameters of hexagonal cylindrical head bolts
Specification type The national standard for hexagon socket head screws is GB70-1985. There are many specifications and sizes, including 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 ...Read more -
DIN912 – Hexagon Socket Head Cap 10.9 Grade Allen Bolt 12.9 Grade Hex Allen Key Bolts
Internal hexagonal cylindrical head bolt, also known as internal hexagonal bolt, cup head screw, or internal hexagonal screw, has different names but represents the same meaning. The commonly used hexagon socket head screws also have grades 4.8, 8.8, 10.9, and 12.9. Also known as internal hexagon...Read more -
The anti-corrosion measures for anchor bolts in different environments mainly include the following
1. Normal environment Apply anti rust paint: Apply a layer of anti rust paint on the surface of the anchor bolt, which can to some extent block air and moisture, and prevent rust. 2. Wet environment Galvanizing treatment: By hot-dip galvanizing or electrogalvanizing process, a layer of zinc is fo...Read more -
Wholesale of anchor bolts
Hebei Dashan Fasteners Co., Ltd. has a variety of sizes and models of anchor bolts, depending on factors such as diameter, length, thread specifications, and material. Here are some common examples of sizes and models: diameter: The diameter of anchor bolts is usually between M6-M60, and common s...Read more -
Professional Knowledge Of The Operating Procedures And Applications
Specified by manufacturers of rebar connection sleeves Steel bar connection sleeve manufacturers are widely used in the engineering and construction industry, the key is to use a variety of concrete structures in the construction of steel bar lap. Striping and cold-rolle...Read more