Bolt, High strength bolts, Screw
Hexagonal bolt: A type of fastener consisting of a head and a screw (cylindrical body with external thread), which needs to be matched with a nut and used to tighten and connect two parts with through holes. This type of connection is called bolt connection. If the nut is unscrewed from the bolt, it can separate these two parts, so bolt connection is a detachable connection. 1. According to the stress mode of the connection, there are ordinary and reamed holes. The bolts used for reaming holes should match the size of the holes and be used when subjected to lateral forces 2. According to the shape of the head, there are hexagonal heads, round heads, square heads, countersunk heads, etc. Generally, countersunk heads are used in places where the surface is required to be smooth and not protruding after connection, because countersunk heads can be screwed into the parts. Round heads can also be screwed into the parts. The tightening force of square heads can be larger, but the size is large. Hexagonal heads are the most commonly used. In addition, in order to meet the needs of locking after installation, there are holes in the head and the rod, which can prevent the bolts from loosening when subjected to vibration.
