3M Bayonet female to round pipe 25mm OD adapter
grabcad
This is to couple a 3M respirator mask with three-prong male 3M bayonets to a 25mm OD round tube. I use this with a PAPR. If you need to couple to a bigger pipe, use a tube coupling or expand to fit your pipe.The three side holes are for M6 set screws to secure the pipe in place and to allow twisting the pipe if needed (useful if the pipe has a 90-degree bend). The holes need M6 tapping.This was printed in 430 steel/bronze at Shapways which has some shrinkage. If you print in plastic, you may find the part a bit bigger. Use at your own risk
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