Screw fasteners can produce many different screw fasteners depending on the head shape, groove shape, tooth shape, size, surface treatment, etc. Even if the material, thread diameter, length, and groove shape are the same, the shape of the screw is different depending on the head type. So, what are the head types of screw fasteners?
Pan head: Pan head code is P, English name is pan head. The head of the screw is protruded from the surface of the coupled object after assembly. The common groove type of pan head screws is a cross groove, a slot, and a m-shaped groove. Be sure to specify the specifications you need when purchasing pan head screws: thread diameter, thread length, head diameter, head thickness, groove shape, material, surface treatment, etc.
Pan head with a screw: the head with a code name is PW, the English name is pan washer head or pan collar head. Generally, the use of the screw with the media is mainly to protect the product and reduce the damage of the surface of the product. When buying the pan head with the screw, you should know the specifications you need: thread diameter, thread length, head diameter, meson size, meson thickness, head thickness, groove shape, material, surface treatment, etc.
Large flat head screw: The big flat head code is T, the English name is truss head or mushroom head. Generally, the large flat head screw is used because the head of the screw is larger than the head diameter of the general screw, and the force area is larger, and the product is not easily damaged at the screw joint.