What Are The Characteristics Of The Half Round Head Square Neck Screw?

Screws are widely used in all aspects of our lives. There are many types of screws. Among them, the semi-circular head square neck screw is the most commonly used one. Next, let's take a look at the knowledge about the semi-circular head square neck screw!

The semi-circular head square neck screw is as its name suggests. Insert the square neck of the head into the groove of the connected piece, reduce the height of the protruding surface, and tighten the screw from the opposite side. It is mostly used in places where the force is not too strong, so the material is relatively soft. The characteristic of the semicircular head square neck bolt is that the head is made into a semicircle, and a square neck is made under the head. On the connected parts connected with this kind of bolts, a corresponding square hole should also be made. When the bolt is inserted into the connected part and the nut is screwed on, the bolt will not rotate due to the square neck. It has a smooth head and is not easy to catch other objects.

Half-round head square neck bolts are mainly used for the occasions where the connected parts are not suitable for hexagonal bolts due to structural limitations or the bolts are required to have relatively smooth exposed parts. Such as agricultural machinery has car feet, wall panels and so on. This kind of bolt is divided into two kinds according to the head size: ordinary and large semi-circle head. The large semi-circular head square neck bolt has a straight head and a large diameter, but its thickness is slightly thinner. This kind of bolt is mostly used on trucks, barges, iron-wood looms, and other wooden structural parts, etc. Because of the large bearing surface of the head, it is not easy to sink into the wooden connected parts. Both of these half-round head square neck bolts are rough bolts.