1.slotted ordinary screws
More for connections to smaller parts. It has pan head screws, cylinder head screws, half countersunk screws and countersunk screws. The head of the pan head screw and the head screw have a high strength and are connected to the common parts; the head of the semi-sunk head screw is curved, and its top end is slightly exposed after installation, and is beautiful and smooth, generally used for instruments or precision. Mechanically; countersunk screws are used where the nail head is not allowed to be exposed.
2.hexagon socket and hexagonal socket screws
The head of this type of screw can be embedded in the component, can apply a large torque, and has a high joint strength, which can replace the hexagonal bolt. Commonly used in joints where the structure is required to be compact and the appearance is smooth.
3.cross slot ordinary screw
It has similar functions to the slotted ordinary screws and can be replaced with each other, but the grooved ordinary screw has a high trough shape, is not easy to be bald, and has a beautiful appearance. When using, it must be loaded and unloaded with the matching cross-shaped screwdriver.
4.lifting ring screws
The eyebolt is a hardware accessory for load-bearing during installation and transport. In use, the screw must be screwed to the position where the bearing surface is tightly fitted. It is not allowed to use the tool to tighten, nor is it allowed to have a load perpendicular to the plane of the lifting ring.
5.the locking screw
The locking screw is used to fix the relative position of the mechanism. Screw the locking screw into the screw hole of the part to be locked, and press the end to the surface of the other part, that is, fix the previous part to the latter part.
The locking screw is usually made of steel or stainless steel and has a tapered shape, a concave shape, a flat head shape, a cylindrical shape, a stepped shape, and the like. The end of the tapered end or the concave end locking screw directly tightens the part, which is generally used for the installation after the installation; the end of the flat end locking screw is smooth, and the surface of the part is not damaged after being tightened, and is used for the joint where the position needs to be adjusted frequently. It can only transmit small loads; the cylindrical end locking screw is used to adjust the fixed position frequently, it can withstand large load, but the anti-loose performance is poor, and the anti-loose measures should be taken when fixing; the stepped 肜 locking screw is suitable for Parts with large wall thickness are fixed.
