závitem

Závitem is the instrumental singular form of the Czech noun závit, which denotes a screw thread or other helical groove on a cylindrical surface. In engineering and construction, a thread enables fastening or adjustment between components such as screws, bolts, nuts, pipes, and threaded holes. The concept underpins common fastener systems and mechanical connections.

A thread is defined by parameters such as nominal diameter, pitch (the distance between adjacent thread crests), and thread form. The most widely used standards are ISO metric threads (designated with the letter M, for example M6) and various imperial or national threads (such as UNC or UNF). Standard thread geometry includes the flank angle and the crest/root profiles, which determine compatibility between male and female threaded parts. Pipe and conduit threads also follow standardized profiles, though they may be governed by different specifications.

In Czech grammar, závitem is the instrumental singular form of závit and is used to express means or instrument in relation to threading in descriptive or technical language. In practice, the concrete physical concept is usually referred to by závit, while závitem appears in sentences where the means of threading or the presence of a thread is being described.

See also: závit, thread, screw thread, thread standards, ISO metric threads.