German Type Worm Drive Hose Clamp consist of a band. Often galvanized or stainless steel. Into which a screw thread pattern has been cut or pressed.One end of the band contains a captive screw.
The clamp is put around the hose or tube to beconnected.With the loose end being fed into a narrow space between the band and the captive screw. When the screw is turned, it acts as a worm drive pulling the threads of the band. Causing the band to tighten around the hose (or when screwed the oppositedirection, to loosen).
Screw clamps are normally used for hoses 1/2 inch diameter and up. With other clamps used for smaller hoses.
+
![](data:image/svg+xml;charset=utf-8,<svg height="100px" width="400px" xmlns="http://www.w3.org/2000/svg" version="1.1"/>)
![](data:image/svg+xml;charset=utf-8,<svg height="14px" width="21px" xmlns="http://www.w3.org/2000/svg" version="1.1"/>)
![](data:image/svg+xml;charset=utf-8,<svg height="1000px" width="1000px" xmlns="http://www.w3.org/2000/svg" version="1.1"/>)
![](data:image/svg+xml;charset=utf-8,<svg height="128px" width="128px" xmlns="http://www.w3.org/2000/svg" version="1.1"/>)