the types of bolts and bolts commonly used for flat bearing surfaces are different:
Flat head: a new design that can replace the round head and the mushroom head. The head has a low diameter and a high peripheral edge of the outer circumference of the head, which makes it play a high-intensity torque, and the head is in the head shape. There are minor differences.
Round head: It is the most commonly used head shape in the past.
Top column head: The standard flat dome head has a smaller diameter than the round head, but it is relatively high due to the groove depth. The smaller diameter increases the pressure acting on the small area and can be tightly combined with the flange and the raised surface. . Since they are used in the drilling molds provided for the purpose of ensuring concentration, they can be successfully applied to the holes of the inner drilling.
Wide-width head: The most common application in electrical appliances and tape recorders due to the incision under the head and the weakening of the wear on the wires. The mid-lower head type is more attractive for its fuller bearing. Type of design.
Large round head: also known as the elliptical top wide side head, is a low-profile, cleverly designed large-diameter head. It can be used to cover metal plate holes with larger diameters when the combined tolerances of the additional action allow. It is also advisable to use a flat head instead.
Slotted head type: This is a creative anti-loose type. Once the combination is not easy to remove, it can be started with a standard standard screwdriver. This simple design can often solve the cost problem in the portfolio, increase the number of production, and create amazing economic benefits for the manufacturing process.
Hexagon socket head: A knot with a wrench head height and a hexagonal head size. The hexagon is completely formed by the cold mold of the counter hole, and there is a distinct depression at the top of the head.
Hexagon socket head Huashi head: such as the standard hexagon socket head type, but at the same time there is a Huasi surface on the head base to protect the assembly, so as not to damage the wrench. Sometimes the role of things is far more important than the appearance.
Hex Head: This is a standard type of torque applied to the hex head, which has the ability to trim sharp sharp corners to near tolerance. Can be recommended for general commercial use, as well as for various standard modes and various thread diameters. Because of its necessary