1/4" I.D. hose vacuum bagging connector with straight port, no schrader valve, non-shear disk, and o-ring sealed breach. Or you could just call it a "frog".

Inspired by http://www.thingiverse.com/thing:61666 by DariusShekari

Used for expoxy vacuum infusion of ABS 3d printed parts. See additional images for the ultra cheap set-up :)

0.3mm, 3 layer, 90% fill for Foot.

0.2mm, 3 layers, 25% fill for Ring and Nut

Made with or without rafts, no supports. PLA @ 240 C, feed 100 mm/s.

Use with -223 O-ring for seal.

Bag goes between o-ring and ring. Hole in bag should be snug around base of threaded stem of foot before tightening the nut.

Wipe clean before expoxy/resin sets. Drill hole if clogged. Gets better with each use. If used to full cure, throw foot away and print another.