Fasteners Non-Standard Set Screw Series

Machine thread grub screw:is designed to hold pieces of machinery together. Most machine thread screw require that the hole already be drilled and threaded, although there are a few types of machine screw capable of tapping their own holes. Like other screws, machine thread screw are available in a variety of shapes and sizes. Pan head machine screw are machine screws with heads that are flat on top and rounded on the sides. They're similar to oval head machine screws, which also have rounded sides; the difference is that oval head screws have a rounded top, too, as opposed to a flat top, and they have tapered bases. Both are commonly used for metal applications. Pan head machine screws can also be differentiated from flat head screws, which have flat tops, as well. However, flat head screws are tapered on the underside of the head so they can lie flush with the material they're driven into. Meanwhile, round head screws have flat bottoms with rounded heads, much like half a sphere. Round head screws can't sit flush with the material they're driven into; instead, their heads poke out like little bumps.

We can do customized screws as your request, you can refer to the chart below to do your own grub screw.