DIN939 Thick double-head bolts GB898A is a specification for double-head bolts specified in the Chinese national standard (GB). This type of bolt is characterized by threads on both ends and a smooth rod or partial thread in the middle.The GB898A standard specifies in detail the dimensions, tolerances, mechanical properties and other requirements for this type of double head bolt.

Carbon Steel: Typically used for general applications.

Stainless Steel: For environments where corrosion resistance is required.

Alloy Steels: Used in applications requiring high strength or high temperature resistance.

Advantage:

HIGH STRENGTH: GB898A standard double head bolts are usually made of high strength materials and are able to withstand large preloads and working loads. Reliability: With threads on both ends, these bolts can be used to connect two components with through holes, providing a reliable connection. Reusable: Compared to welded or other permanent connections, double-ended bolts allow for disassembly and reuse for easy maintenance and repair. Versatility: GB898A standard double head bolts are available in a wide range of sizes and lengths to suit different applications.

Scope of Application

Mechanical connections: In mechanical manufacturing, double head bolts are commonly used to connect parts that require high strength connections, such as engine parts, pumps and compressors. Steel construction: In steel construction, double head bolts are used to connect beams, columns and other structural components, especially where high strength and removability are required. Bridge construction: In bridge construction, double-ended bolts are used to connect various parts of the bridge, such as the deck and supporting structures. Mining Machinery: In mining machinery, double head bolts are used to connect heavy mechanical components such as excavators and drilling rigs.