Bolts and screws both have a range of head styles. These are made to work with the tool that is used to tighten them. Instead, some bolt heads lock the bolt in place, preventing it from moving and necessitating the use of a tool only for the nut end. The bolts are threaded on the outside, while the nuts are threaded on the inside. The male threads on the bolts match the female threads on the nuts. The M10 High Tensile Studs are threaded on both ends and are made of metal. As the M10 designation indicates, these are also about 10mm in diameter.

There are many grades available, including 10.9, 8.8, DIN 933, and 12.9 grades. Many other standards exist, including IS1364, IS1363, DIN EN ISO 4014, and others. These standards describe fastener sizes ranging from 20mm to 100mm. The various forms, such as the HT Nut Bolt, are used for various purposes. Threads attach the nut bolts together.