Do you know how many types of screwsDo you know how many types of screws
Today Heatscrew will introduce some types of screws for you
It is mostly used for the connection of smaller parts. It has pan head screws, cylindrical head screws, half countersunk head screws and countersunk head screws. The head strength of pan head screws and cylinder head screws is relatively high, and they are connected to common parts; the head of the countersunk head screw is curved, and its top is slightly exposed after installation, and it is beautiful and smooth. It is generally used for instruments On precision machinery; countersunk head screws are used where the nail head is not allowed to be exposed.
Hexagon socket screw
The head of this type of screw can be embedded in the component, can apply a larger torque, the connection strength is higher, and it can replace the hexagonal bolt. Often used in joints with compact structure and smooth appearance
Cross recessed screws
It has similar functions to slotted screws, and can be replaced with each other, but the cross-slotted screws have higher groove strength, are not easy to be slide, and have a more beautiful appearance. When in use, the cross head screwdriver must be matched.
Self tapping screws
When the self tapping screw is used on the connected part, the connected part does not need to be threaded in advance. When connecting, use screws to tap the threads directly. It is often used to join thin metal plates. There are two types of tapping screws with taper end and tapping screws with flat end.
Self tapping lock screw
Self tapping locking screws not only have self-tapping effect, but also have low screwing torque and high locking performance. Its thread has a triangular cross-section, and the surface of the screw is hardened and has high hardness. Its thread specifications are M2～M12
The eyebolt is a kind of hardware accessory for load-bearing during installation and transportation. When in use, the screw must be screwed to the position where the supporting surface fits tightly. No tools are allowed to be tightened, and no load perpendicular to the plane of the lifting ring is allowed to act on it.
set screws are used to fix the relative position of the machine parts. Screw the set screw into the screw hole of the part to be tightened, and press its end against the surface of another part, that is, fix the former part on the latter part.Set screws are usually made of steel or stainless steel, and their end shapes are tapered, concave, flat, cylindrical, and stepped. The end of the tapered or concave end set screw directly tightens the part, which is generally used in the place where it is not often disassembled after installation; the flat end set screw has a smooth end and does not damage the surface of the part after tightening. It is used for frequent adjustment of the position. Only small loads can be transmitted at the connection; the cylindrical head set screw is used in the fixed position that needs to be adjusted frequently. It can withstand larger loads, but the anti-loose performance is poor, and anti-loose measures should be taken when fixing; Set screws are suitable for fixing parts with larger wall thickness.
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