Standard Airline Tubing Hose Barb - External Threads
thingiverse
Working on a project based off Grant Thompson's HHO generator. Needed some hose barbs to funnel gas to a bubbler, but couldn't find any that fit for my purposes at the hardware store, so made my own. Got inspiration from this: M8x1.25 Thread to 3/16 Hose Barb Fitting on Thingiverse. It's a standard hose barb design, but needed one with different specifications: external threads for easier installation and future tightening, longer threads using two M8 nuts for stability, and thinner hose barb. Airline tubing from Walmart is thinner than expected, so the 3/16" didn't fit. The new hose barb has a 4mm end diameter and 4.6mm barb diameter. Cut washers from thin craft foam sheets to create a seal until finding appropriate O-rings. Sealing fine so far with silicone around threads and pressing lightly into the hole, forming a great O-ring. Silicone doesn't truly stick to most things, making it removable in the future.
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