The main categories include ordinary screws, machine screws, self-tapping screws and expansion screws.
Cap screws used to be limited to full-thread fasteners.
Hex cap screw and Hex bolt Hex bolt As the name suggests, it is a male threaded fastener with a hexagonal head, designed to be turned with a wrench. According to the ASME B18.2.1 standard, the head height and shank length tolerance of the hexagon head screw (Hex cap screw) is smaller than that of the general Hex bolt (Hex bolt), so the ASME B18.2.1 hexagon screw is suitable for installation in all hexagon bolts that can be used. places, also including places where the large hex bolts are too large to be used.
Socket cap screw, also known as socket head screw or), is a screw with a hexagonal inner hole on the head, which can be tightened or loosened only after a hexagonal ruler (hex key, Allen wrench or Allen key) is inserted into the inner hole. The most commonly used hexagon socket head screws are cylindrical head screws with a head diameter of about 1.5 times the main diameter of the thread (1960 series). Countersunk head cap screw. The countersunk hole design allows the screw head to be rotated without being exposed on the surface of the fixed object, so it is mostly used in places where the surface is small and it is inconvenient for traditional wrenches to use.
Machine screws are generally less than ¼ in diameter screws (412), usually full teeth and turned by a screwdriver, such as slotted, cross or hexagon socket.
Wood screws, machine screws; but can be divided into many categories according to different uses; machine screws can be divided into longitudinal tightening screws and lateral expansion screws; according to the thread can also be divided into:
A: Triangular thread (60 degrees): combined / locked / expanded
B: Triangular thread for pipe (55 degrees): Combine/lock 3)
C: Trapezoidal thread (30 or 29 degrees) : Power transmission
D: Square thread (90 degrees): Power transmission
stainless steel screw
Screws And Shafts For Motorcycle Or Bicycle
Stainless steel naruo screw
Screws And Shafts For Sewing Macing
Socket Set Screws
Stainless Steel Coarse Thread Screws
Stainless Steel High-Low Thread Screws
Stainless Steel Machine Screws
Stainless Steel Self Drilling Screws
Stainless Steel Self Tapping Screws
Stainless Steel Thread Cutting Screws
Stainless Steel Tri-Lobular Thread Screws