A stud bolt is a straight rod with threaded ends at both ends. Generally, a bolt is a head + a screw rod, and a smooth screw rod in the middle. It is more used for electric power, such as on a transformer or assembled with a cross arm.

The difference between it and hot-dip galvanized bolts is: hot-dip galvanizing is mechanically galvanized, the kind that is very thick, and the kind with strong salt spray test ability.

Various galvanized bolts

There are many kinds of hot-dip galvanized bolts. For example, 30 bolts and 21 bolts are classified as one type. Hot-dip galvanized bolts also include tower bolts and guardrail wires.

This is very broad. Many bolts only need to be hot-dipped. Zinc surface treatment can be called hot-dip galvanized bolts.

Bolts specifically refer to screws with larger diameters, and can also have no heads, such as stud bolts. Generally, it is not called a “stud bolt” but a “double stud”.

The most commonly used form of double-ended studs has threads at both ends and a polished rod in the middle. The most typical use: anchor bolts, or places similar to anchor bolts, thick connections, when ordinary bolts cannot be achieved.

Manufacturing material

Stud bolts are manufactured according to the GB897-901 standard. The materials used are: Q235 steel, 45# steel, 40Cr, 35CrMoA, Q345D, the stud specifications are: M3mm-M100mm, and the length can be customized according to user requirements.

The materials used for high-strength stud bolts are 35# steel, 45# steel, 35CrMoA, 25Cr2MoV, 304 stainless steel, 316 stainless steel, 304L stainless steel, 316L stainless steel, 2H, 2HM, B7, B7M, B16, B8, 8, B8M, 8M

It is widely used in electric power, chemical industry, oil refining, valves, railways, bridges, steel structures, automobile and motorcycle accessories and other fields.

The role of stud bolts: mostly used in mining machinery, bridge construction, automobiles, motorcycles, boiler steel structures, suspension towers, large-span steel structures and large buildings.

Usually stud bolts are expressed as: M12×100 GB/T901-88 (standard) 35# (material)/8.8 (performance level)/8 (modulation level), which means:

double-headed bolts with a diameter of 12mm and a length of 100mm The head bolt adopts the national standard: GB/T901-88 (the industry standard can be selected according to the user’s requirements).

Well, this is a basic introduction to hot-dip galvanized stud bolts. As an industrial product, stud bolts have been widely used in all walks of life.

There are many small stud bolts that will be used in auto parts. Occasionally, I can observe it. Today’s sharing is over, see you next time~