Two-sided hose & pipe adapters, any thread or barb → STL / 3MF
Unofficial · experimental · use at your own risk. Not a U.S. Navy or DoD website. This one carries fluid. Use it for gravity drains, ventilation, wash-down, and fit-checks before machining the real one — never firemain, hydraulics, fuel, air, steam, or anything on a hull boundary. Threads strip and barbs pull out of clamps suddenly. Full disclaimers