The Role Of Studs

Double-headed bolt: The English word is stud. Everyday people also call it double-headed screw and double-headed stud.

Function: The double-headed bolt is used to connect the mechanical fixed link function. The double-headed bolt has threads at both ends, and the middle screw rod is thick and thin.

Scope of use: Generally used in mining machinery, bridges, automobiles, motorcycles, boiler steel structures, hanging towers, large-span steel structures and large buildings.

Basic introduction: As we all know, bolts refer specifically to screws with larger diameters, and some may not have heads, such as stud bolts. Generally, it is not called "double-headed bolt" but "double-headed stud". The most commonly used form of studs is threaded at both ends and a polished rod in the middle. Uses such as: anchor bolts, or places similar to anchor bolts, thicker connections, when ordinary bolts cannot be achieved. It is manufactured in accordance with GB897-901 standard, the materials used are the following: Q235, 45 #, 40Cr, 35CrMoA, Q345D, specifications: M3mm-M100mm, the length can be customized according to user needs.

High-strength double-headed bolts made of 35 #, 45 #, 35CrMoA, 25Cr2MoV, 304, 316, 304L, 316L, 2H, 2HM, B7, B7M, B16, B8, 8, B8M, 8M, it is widely used in electric Chemical industry, oil refining, valve, railway, bridge, steel structure, automobile and motorcycle accessories and other fields

Representation method of double-headed bolts: general double-headed bolts are expressed as: M12 × 100 GB / T901-88 (standard) 35 # / 35 # (material) class 8.8 / 8 (modulation level) means: diameter = 12mm = 100mm GB / T901-88 adopts the national standard (of course, industry standards can also be used as needed)

Stud bolt standard: GB / T900-1988

Specification: Thread specification d = M12, nominal length L = 80mm, performance class 4.8 equal length double-headed bolts, complete marking: GB / T901M12 × 80

Advantages of the use of stud bolts: 1. Used in large-scale equipment, the accessories need to be installed, such as sight glass, mechanical seal seat, deceleration frame, etc. This is the stud bolt used, one end is screwed into the main body, installed The other end of the attachment is provided with a nut. Since the attachment is often removed, the thread will be worn or damaged, and it is very convenient to replace it with stud bolts.

2. When the thickness of the connecting body is very large, and the bolt length is very long, stud bolts will be used