Container threads can vary, among other things, in its dimensions depending on the material used. Roetzmeier Safety Containers are made of stainless steel, connections and openings have standard thread types of the metal sector (G-thread and TPI thread) and standard sizes (G1½", G1¼", G¾" and 2" TPI). Manufacturer of plastic or glass containers usually use different thread types, adapters for nearly all sizes of threads are available in the market. These allows, for example, to use tools for a number of different types of containers.

Within the different materials, the accuracy of thread types and sizes is different. In the metal sector, you can rely on the accuracy of standard threads. In the field of plastic containers there may exist differences between formally identical threads. For the PE screw caps (buttress thread) of our safety funnel the following table shows, which dimensions appropriate container connection should have, in order to fit the funnel properly. If your plastic canisters do not meet the specified dimensions, please let us know. We will check whether an adjustment of our safety funnels according to your needs is possible.