GL45 screw caps (plain, with holes, with Luer plugs)
thingiverse
A set of screw caps, compatible with GL-45 threads. I designed these caps for several student projects, where I needed some sort of adapter from the usual GL-45 cap to 1/4 inch OD tubing. Screwing-in NPT to "Push-to-connect" fitting seemed to be the best option, but the thickness of usual GL45 caps was not enough for sealing. Use of sealant and epoxy glue wasn't an option. These caps were used in several cases: - caps for storage vessels - inoculum storage, when some biomass decomposition can occur and need to release extra pressure (used with one-way valve, screwed in the cap) - liquid barbotage system
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