12mm(1/2") Through hole hose fitting wall mount
thingiverse
My plan was to send a fuel line through a wall, and it needed to be water tight on the outside. There is a slot for an O-Ring on the outside base. ID: 1 7/16 - OD: 1 11/16 - Thickness: 1/8 (Got the O-ring from the Harbor freight O-ring set) The screw indents are designed for #8 Truss head screws with a 11mm head. The outside Base Tip, is just a strain relief for the hose, it just pops in with a little glue. The Outside Base should be flipped so the o-ring side is facing up, and enable supports. Not strictly needed though, it just makes the screw holes cleaner. This ended up working perfectly, and is strong.
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