Flange bolts are integral bolts composed of hexagon head, flange (washer and hexagon fixed body under the hexagon) and screw (cylinder with external thread). Need to be fastened with the nut to connect the two through-hole parts. The flange bolts can be separated. If the nut is removed from the bolt, the two parts can be separated, so the bolt connection is a detachable connection. Flange bolts need to be matched with nuts to fix the two through-hole parts. There are four types of flange bolts: 1. Types of hexagonal flange bolts: There are two types of hexagonal heads, one is concave head and the other is flat head. 2. Surface color classification: according to different needs, the surface is plated white, army green, yellow, and will never rust. 3. Flange bolt category: according to the position of the flange bolt, the size requirements of the disc will be different. There are also teeth on the bottom, flat, with teeth to prevent slipping. 4. According to the connection f...