Torx screw, formally known as Hexalo64 Screw or star socket screw, is a screw fastener developed and marketed by Camcar Textron in 1967. It was also called Torx screw because the brand name Kangga patented was Torx. Plum screws are commonly found in automobile, motorcycle, bicycle brake systems, har
There are many kinds of screw material, the general use according to the performance level can be divided into, 6.8 level below the use of carbon steel. Grades 8.8-10.9 are made of low carbon alloy steel. Grade 10.9 is made of medium carbon alloy steel. Grade 12.9 adopts alloy steel. Grade 8.8 and a
There are two kinds of electrically galvanized screws. The first is hot-dip galvanized bolt; The second is cold galvanized bolt, commonly used galvanized yellow bolt; The main function of these two kinds of bolts is rust prevention. The rust prevention ability of the first kind of bolt is much stron
Tapping screw is a kind of screw fastener, mainly used for pre-drilling between metal and non-metal materials, which can drill holes matching with female thread. The tension of the self-tapping screw is relatively strong, and contains the characteristics of a single piece, unilateral combination, th