ST, or straight tip, connectors are a quick Release bayonet style connector. They are used most commonly in Fiber optic networking applications. They can be used with both short distance applications and long line systems.

Coupling and 2.5mm keyed ferrule. They have a bayonet mount and a long cylindrical Ferrule to hold the fiber. They're spring-loaded, SO users must make sure they are seated properly., but they are easily inserted and removed."}" data-sheets-userformat="{"2":769,"3":{"1":0},"11":4,"12":0}">ST connectors are cylindrical, with a twist lock coupling and 2.5mm keyed ferrule. They have a bayonet mount and a long cylindrical ferrule to hold the fiber. They’re spring-loaded, so users must make sure they are seated properly., but they are easily inserted and removed.