Novelty Trading Development Co.,Ltd
Add:R507, 95 Business Mansion, Jiangnan Road, Ninbo City, China
Contact us:Jack Chen
The English name of riding Bolt is U-bolt, is a non-standard, shape is U-shaped so also known as U-Bolt, two threads can be combined with the nut, mainly used for fixed tubular objects such as water pipes or sheet springs, because of its fixed object way like people riding in the instant, so called riding Bolt.
The thread length is divided into two categories: full thread and non-full thread.
The tooth type according to the thread divides into the coarse tooth and the fine tooth two kinds, the coarse tooth type is not shown in the bolt logo.
Bolts are divided into 3.6, 4.8, according to performance grades. 5.6, 5.8, 8.8, 9.8, 10.9, 12.9 Eight grades, of which 8.8-level above (including 8.8 level) bolt material is low carbon alloy steel or medium carbon steels and heat treatment (quenching + tempering), commonly known as high strength bolts, 8.8-level below (excluding 8.8 level) commonly known as ordinary bolts.
Ordinary bolts in accordance with the production precision can be divided into a, B, c three grades, A, B-level for refined bolts, C-level is coarse bolt. For steel structure connection bolts, in addition to special mention, generally for the general coarse C-level bolts.
There are differences in the different levels of processing, and usually correspond to the following processing methods:
① A, B-level bolt bolts from the lathe processing, surface smooth, precise size, the material performance grade 8.8, the production and installation of complex, high prices, rarely used;
② the C-level bolts are made of raw round steel, the size is not precise, the material performance level of 4.6 or 4.8. The shear connection is large, but the installation is convenient, the production cost is low, and is used for the temporary fixing of the tensile connection or installation.