Knurled metal knobs are industrial knobs that feature a metal construction and a knurled finish. Knurling is a manufacturing process. There are several types of knurling, such as diamond and straight knurling. Nonetheless, they are all designed to create a patterned surface.

When inspecting a knurled metal knob, you’ll notice a pattern on its surface. The knurled metal knob depicted in the photo above features a pattern on the sides. Patterns such as these are knurled finishes. Typically performed with a lathe machine, they feature indention lines or crosses that you can see and feel. All knurled metal knobs are made of metal, and they have a knurled surface.

You can identify knurled metal knobs by their knurled finish. Other types of industrial knobs lack this same knurled finish. Instead of a knurled finish, they are smooth.

Knurled metal knobs are made of metal. Other types of industrial knobs may or may not be made of metal. Some of them are made of the same steel materials as knurled metal knobs, but others are made of plastic. Plastic is an alternative material in which industrial knobs are made. Rather than being made of steel or similar iron alloys, other types of industrial knobs are made of plastic.