A small taper at the male end of this elbow. It only fits about 1/4" into my fine vacuum fitting. I was able to solve the problem by softening the ABS plastic with a heat gun, placing the fitting in a vacuum and allowing it to cool before removing it. Now it fits it perfect!I think a high powered hair dryer will work even if you don't have a heat gun.
π¦ Giraffe Industrial Flexible Air Hose Compressor: Efficient & Versatile
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