The name BNC (Bayonet Neill–Concelman) is originated from its bayonet mount locking mechanism (a cylindrical male side with one or more radial pins, and a female receptor with matching L-shaped slot(s) and with spring(s) to keep the two parts locked together) and its inventors, Paul Neill and Carl Concelman.
The BNC connector is a quick connect/disconnect radio frequency (RF) connector used for coaxial cable (a type of electrical cable that has an inner conductor surrounded by a tubular insulating layer, surrounded by a tubular conducting shield).
https://en.wikipedia.org/wiki/BNC_connector
https://sites.mit.edu/meche2004/wp-content/uploads/2019/06/BNC.pdf