Industry knowledge
Railway Bolts are mechanical parts, cylindrical threaded fasteners with nuts/sleeves. A type of fastener consisting of a head and a screw (a cylinder with external threads), which must be matched with a nut/sleeve to fasten and connect two parts with through holes. This type of connection is called a bolt connection. If the nut/sleeve is unscrewed from the bolt, the two parts can be separated, so the bolt connection is a detachable connection.
According to the force-bearing mode of the connection: ordinary and with reamed holes. According to the shape of the head: hexagonal head, round head, square head, countersunk head, etc. Among them, the hexagonal head is more commonly used. According to the thread type, it is divided into coarse thread and fine thread. The coarse thread type is not displayed in the bolt logo.
Railway Bolts are divided into eight grades according to performance level: 3.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, and 12.9. Bolts above grade 8.8 (including grade 8.8) are made of low-carbon alloy steel or medium-carbon steel and are heat-treated (quenched + tempered), commonly known as high-strength bolts, and bolts below grade 8.8 (excluding grade 8.8) are commonly known as ordinary bolts.
GNEE RAIL is a high-tech enterprise focusing on the research and development, production and sales of railway products. The main products include rail buckle accessories, turnout connectors, fine adjustment parts, height adjustment pads, fishplates and fishbolts, frozen (bonded) joint splints, anchor bolts, turnout bolts, gauge blocks, adjustment plates, iron pads and other line-specific accessories and customized processing parts. Sincerely welcome new customers to visit, negotiate business and cooperate!
