A round head bolt is a type of bolt and is mainly used for decoration. It is also the most commonly used one. Keep the shape of the fixture flat and beautiful, easy to disassemble and install. The ball stud can sink into the counterbore of the clamp to avoid the trouble caused by the bolt head protruding. For the rotating jig, it is possible to avoid the scraping of the bolt protruding from the head, and to avoid unsteady when the workpiece is clamped.
Bolt: A type of fastener consisting of a head and a screw (a cylinder with an external thread) that is to be fitted with a nut for fastening two parts with through holes. This type of connection is called a bolted connection. If the nut is unscrewed from the bolt, the two parts can be separated, so the bolt connection is a detachable connection. According to the shape of the head: there are hexagonal heads, round heads, square heads, countersunk heads, etc. The hexagonal head is the most commonly used. Generally, the countersunk head is used where the surface is smooth and does not protrude after the connection is required, because the countersunk head can be screwed into the part. The round head can also be screwed into the part. The tightening force of the square head can be larger, but the size is large. In addition, in order to meet the needs of locking after installation, there are holes in the head and holes in the rods, which can not loosen the bolt when it is vibrated.
Bolts, with nuts, are used to fasten and connect two connected parts and components with through holes. Hex head bolts are the most widely used type of bolt. Class A and Class B bolts are used for important applications where assembly accuracy is critical and where large shocks, vibrations or loads are encountered. Class C bolts are used where the surface is rough and the assembly accuracy is not high. The thread on the bolt is generally a common thread of coarse teeth. The ordinary threaded bolt of the fine tooth has good self-locking property, and is mainly used for thin-walled parts or with impact, vibration or alternating load. Generally, the bolts are made into partial threads, and the full-thread bolts are mainly used in the case of requiring longer threads. Perforated bolts are used where bolt locking is required. The hinged hole bolts accurately fix the mutual position of the connected parts and can withstand shearing and squeezing caused by lateral forces.
The head of the hexagonal flange is not composed of the hexagon and the flange surface. The ratio of the bearing area to the stress area is larger than that of the ordinary hexagon bolt, so the bolt can withstand higher preload. The anti-loose performance is also good, so it is widely used in automotive engines, heavy machinery and other products.
The square head bolt has a large square head, which is convenient for the wrench to be stuck, or relies on other parts to prevent the rotation; it can also be used in the part with the T-slot to adjust the bolt position. Class C square head bolts are often used on rougher structures.
Ball studs are often used where the structure is limited, other head bolts are inconvenient, or the connected parts require a smooth head. The square neck or 榫 structure prevents the bolt from rotating; the ordinary round head bolt is mostly used on metal parts; the large round head bolt is mostly used on wooden parts; the reinforced round head bolt is mostly used for occasions subjected to impact, vibration or alternating load; Head bolts are often used where the surface of the connected parts is required to be flat or smooth and does not block things.
T-slot bolts are suitable for bolts that can only be connected from one side of the connected part. Insert the bolt from the T-slot and then rotate it 900, so that the bolt can be removed without being used. It is also used in applications where the structure is required to be compact.
The joint bolts are often used in occasions or tooling where frequent disconnection is required.
The anchor bolts are specially designed for pre-buried in the cement foundation for use as a solid machine.
Bolt mounting tools, hex head bolts can use wrenches, wrenches, socket wrenches or adjustable wrenches; square head bolts can use wrenches or adjustable wrenches; other bolts use corresponding tools to assemble and disassemble bolts with bolts (hex or square nut).
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