By vantal Screws, studs, bolts, nuts, pins, rivets, turning parts and other fasteners are used in daily work and life. What is the difference between themBefore that, custom fasteners The market has also soared for a time, which has attracted the attention of a wide range of investors. https://chescrews.com/
Standard fasteners are divided into eight categories, and the selection can be determined according to the use occasions and functions of the fasteners.
Screws
Machine screws: Divided into many varieties due to different head shapes and groove shapes. Head types include cylindrical head, pan head, countersunk head and semi-sunk head.
Wood Screws: Wood screws are used to screw into wood. There are several types of head types, such as round head, countersunk head, and semi-sunk head. The groove shape of the head is slotted (slotted) and cross grooved.
Self-tapping screws: The working screw holes that match self-tapping screws do not need to be pre-tapped, and the internal thread is formed while screwing in the self-tapping screws.
Set screws: Set screws are used to fix the relative position of parts, and the head has slotted, hexagonal and square heads.
Hexagon socket head screws: Hexagon socket head screws are suitable for occasions where the installation space is small or the head of the screw needs to be embedded.
Special-purpose screws: such as set screws, non-protruding screws and eye screws.
Bolts
General-purpose bolts: There are many varieties, including hexagonal heads and square heads.
Bolts for reaming holes: When in use, insert the bolts tightly into the reaming holes to prevent misalignment of the workpiece.
Anti-rotation bolts: There are square neck and tenon.
Special-purpose bolts: including T-slot bolts, swing bolts and anchor bolts.
High-strength bolt connection pair for steel structure: generally used for friction connection of steel structures such as buildings, bridges, towers, pipe supports and hoisting machinery.
Nut
There are hex nuts, square nuts, slotted nuts, lock nuts, welded nuts, and special-purpose nuts: such as wing nuts, cap nuts, knurled nuts, non-standard nuts, and embedded nuts.
Gaskets, retaining rings
Anti-loosening washer, the washer is used between the supporting surface of bolts, screws and nuts and the supporting surface of the workpiece to prevent loosening and reduce the stress of the supporting surface.
Lock washers are divided into flat washers, spring washers, stop washers and inclined washers.
Non-retraction washers include internal tooth lock washers, external tooth lock washers, single-ear stop washers, double-ear stop washers, and round nut stop washers.
The retaining ring is mainly used to position, lock or stop the part on the shaft or in the hole.
Divided into elastic circlips, steel wire circlips, locking circlips for shaft parts, and shaft end circlips.
Pin
Pins are often used for positioning, but also for connecting or locking parts, and as overload shearing elements in safety devices.
Cylindrical pins: Cylindrical pins are mostly used for fixing parts on the shaft, transmitting power, or as positioning components.
Tapered pin: Tapered pin has a taper of 1:50, which is convenient for installation and self-locking. It is generally used as a positioning element and a connecting element, and is mostly used in places that require frequent disassembly.
Cotter pin: The cotter pin is an anti-loosening device for connecting parts. When in use, it is inserted into a nut, a bolt with a pin hole or a pin hole of other connecting parts, and then separates the feet.