What Are the Types of Screw Hardware?

1. slotted ordinary screws

More connections for smaller parts. It has a chuck screw, cylindrical head screw, semi-sink screw and sink screw. The head strength of the chuck screw and cylindrical head screw is high, the head of the semi-sink screw is curved, the top of the semi-sink screw is slightly exposed after installation, and is beautiful and smooth, generally used on instruments or precision machinery, and the head screw is used in places where the nail head is not allowed to be exposed.

2. inner hexagon and inner hexagonal flower screw

The head of these screws can be buried in the components, can apply a larger torque, the connection strength is higher, can replace the hexagonal bolts. Often used in compact, smooth-looking joints.

3. cross slot ordinary screw

It is similar to the use of slotted ordinary screws, can be exchanged with each other, but the cross-groove ordinary screw slot strength is higher, not easy to screw bald, the appearance is more beautiful. When used, loading and unloading with a matching cross-shaped spinner.

4. ring screw

Hanging ring screws are a hardware accessory for load when installed and transported. When using, the screw should be screwed into the position that makes the support surface tightly fit, do not use the tool to tighten, nor allow the load perpendicular to the lifting ring plane on the load.

5. tightening screw

The tight screw is used to secure the relative position of the machine part. Turn the tight screw into the screw hole of the tighter part and press its end sized on the surface of the other part, i.e. secure the first part to the rear part.

Tight screws are usually made of steel or stainless steel, with end shapes in conical, concave, flat, cylindrical, step-shaped, etc. The end end of the conical end or concave end tightening screw directly top-tightening parts, generally used after installation is not often removed, the end of the flat end-tightening screw is smooth, the top tight does not damage the part surface, used to adjust the position of the joint, can only pass a small load;

6. self-tapping screw

When the self-tapping screw is used on the jointed piece, the thread can be not pre-made at the joint. The thread is directly exploited with a screw when joining. It is often used to joint metal plates that are thinner. Its varieties are conical end self-tapping screws and flat end self-tapping screws two kinds.

7. self-tapping locking screw

Self-tapping locking screws not only have self-tapping, but also have low screw-in torque and high locking performance. Its thread is a triangular cross-section, the surface of the screw is hardened, has a high hardness. Its thread specifications are M2 to M12.