What are the main classifications of stainless steel screws

Update:18 Aug 2020
Summary:

The main categories of stainless steel screws include o […]

The main categories of stainless steel screws include ordinary screws, self-tapping screws and expansion screws.
Cap screws used to be limited to full-tooth fasteners, but this is now not the standard usage.
Machine screws are generally screws with a diameter less than ¼ inches (4#~12#), usually full-threaded and rotated by a screwdriver, such as slotted, cross or hexagon socket.
Hex cap screw and Hex bolt, as the name suggests, are externally threaded fasteners with a hexagonal head, which are designed to rotate with a wrench. According to the ASME B18.2.1 standard, Hex cap screws (Hex cap screws) have a smaller tolerance for head height and rod length than ordinary Hex bolts. Therefore, ASME B18.2.1 Hex cap screws are suitable for installation on all hexagon bolts. Places, including places where large hexagon bolts are too large to be used.


Socket cap screw, also known as socket cap screw or Allen bolt, is a screw with a hexagonal inner hole on the head. It can only be inserted into the inner hole with a hex key (Allen wrench or Allen key). Tighten or loosen. Hexagon socket screws are the most commonly used cylinder head screws, the head diameter is about 1.5 times the main diameter of the thread (1960 series), other head types include the Bottom head cap screw (Bottom head cap screw) for beautiful surface and suitable for tapered screw hole The countersunk head cap screw. The counterbore design allows the screw head to be able to rotate without being exposed on the surface of the fixed object, so it is mostly used in places where the surface is small and traditional wrenches are inconvenient.