46mm Carboy Bung Tensioner

This is a threaded collar for use with fermenters with a mouth of approx. 46mm. It is used to apply downward force on a bung in the mouth of the vessel to prevent it from sliding out - insert the bung, then the collar over the top of it. An S-type or 3-piece fermenter should be able to fit through the void.

Thread info (mm):

<Class>6H</Class>

<MajorDia>49</MajorDia>

<PitchDia>47</PitchDia>

<MinorDia>46</MinorDia>

<TapDrill>47</TapDrill>

Note that these arise from a mixture of measurement and trial and error. They aren't perfect, but certainly seem to be good enough. I recommend printing in PETG. A brim may be needed if bed adhesion is an issue.