Thumb screws are designed to be tightened and loosened by hand. They come in a variety of head styles, but each includes an easy-grip head that allows for simple "by-hand" installation. The screw€s head has a diamond knurled surface for extra grip.

The thumb screw head and body are machined from Nylatron, a nylon 6/6 plastic that offers high strength and rigidity. It also resists high temperatures, making it suitable for a range of environments. It has a plain finish.

A threaded fastener's size name includes information about the major external diameter, followed by the threads per inch, which indicates if it is coarse or fine.