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 which allows for simple "by-hand" installation. The long style has a longer threaded length than conventional thumb screws. It is used in applications where longer threading is needed, such as when fastening thick material. The thumb screw head has a knurled surface that gives a better gripping surface, making it easy to tighten or loosen fasteners manually.
Plain stainless steel 300 provides better corrosion resistance than steel. Stainless steels are used for their corrosion resistance, high-temperature strength, scaling resistance, and low-temperature toughness. These properties account for their wide use in practically every industry.
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.
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