A Grade 18-8 Hex Head Cap Screw features both the fully threaded
and partially threaded shafts
. Besides, the screw is available with coarse, fine or extra-fine threads. A coarse thread is the industry standard. As a beginner who knows little about Hex Head Cap Screws
, it is advisable to choose the coarse pitch.
The other two thread types, fine and extra-fine, appear as closely spaced groves. This aspect helps prevent the cap screw from loosening. Fine threads in the Grade 18-8 screw offer increased resistance to vibrations.
More so, the hexagonal-shaped head is perfect for wrench and socket tightening. Also, the screw is made from Grade 18-8 stainless steel, which does not corrode. You can use this screw in highly humid or wet applications.
Depending on where you intend to use the screw, a wide range of sizes exist that feature different thread spacings. Tensile strength ranges from 70,000 psi to 100,000 psi.