Cylinder adapter W21,7x1/14"(F) LEFT --> 1/4" SAE (M) standard.
Cylinder adapter W21,7x1/14"(F) LEFT --> 5/16 SAE (M) standard.
Tap 1/4"M SAE - 5/16"F SAE with pin (it can open the valve).
Tap 1/2"(F) ACME LEFT - 1/4"(M) SAE with pin (it opens the bottle valve).
Tap 1/2"(F) ACME GAUCHE - 5/16"(M) SAE with pin (it opens the bottle valve).