Plug, Carbon PEEK Endure, 10-32mm threads. Black 10/EA.

Knurled for a tight grip and also has "flat" surfaces for using a wrench to quarter tighten for best seal or to loosen if plug gets stuck.

Screw thread for 1/4 - 28" holes.

Use with Delivery Cap 58820-06 , to prevent oxygen from entering the bottle while one of the holes are not in use.