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Author: Site Editor Publish Time: 2023-04-25 Origin: Site
Carriage bolts are also known as step bolts, which are easily distinguished from ordinary screws by their appearance. The head of a common screw is attached to the screw, while a square neck bolt has an additional square connection between the head and the screw. Today, we will talk about why they are called carriage bolts, what are the standards for carriage bolts, and the role of carriage bolts.
Here is the list of contents
Why is it called carriage bolts?
Standards of carriage bolts
The role of carriage bolts.
As the name suggests, the square neck of the head is embedded in the slot of the connected part to reduce the height of the protruding surface and tighten the screw from the opposite side. They are mostly used in places where there is little force, so the material is relatively soft.
The grade of square neck bolt is C grade, C grade is the fastener which is connected with the screw by the head and needs to be used with the nut, and the square neck bolt is divided into 4.8 grade bolt, 8.8 grade bolt, 10.9 grade bolt, 12.9 grade bolt according to the high strength grade. According to the screw wire material, there are iron bolts and stainless-steel bolts, stainless steel bolts have stainless steel SUS304 bolts, stainless steel SUS201 bolts, stainless steel SUS316 bolts.
There are also round head carriage bolts, brass round head carriage bolts, headless carriage bolts, din603 round head carriage bolts, carbon steel round head carriage bolts, stainless steel round head carriage bolts, galvanized round head carriage bolts, oval head round head carriage bolts, round head carriage bolts, mushroom head carriage bolts, fully threaded round head carriage bolts
It is more widely used, the application range is electronic and electrical industry, water conservancy engineering industry, electrical products, mechanical equipment, chemical equipment, ships, vehicles, bridges, steel structures, and so on.
The square neck bolt is mainly used in machinery, placed in a slotted threaded hole for connection, and the square neck of the screw will be stuck in the slot, preventing the square neck screw from turning in the same direction during installation. The square neck screw can be moved in parallel in the slot. Carriage bolts are not widely used but are mainly used in specialized equipment.
The most used standard number for large semi-round head carriage bolts is CB 12-88, which identifies the shape of the square neck bolt and the standard dimensions of each part
Ningbo yi pian hong Fastener Co., Ltd. was established in 2001, specializing in the production of all kinds of high-strength bolts, nuts, and threaded rods, with an annual production capacity of 30000 tons and an annual turnover of 300 million yuan. Products include ANSI / ASTM, DIN, BS, ISO, GB, JS, and other standards, which are mainly used in the field of high-strength seals and oil pipeline valves.
