American made crew oxygen cylinders are
- green in colour with a LH thread.
- green in colour with a RH thread.
- black in colour with a RH thread.
Explanation
American crew oxygen cylinders follow the US colour code (green) and use a right-hand thread connection, the standard convention for oxygen fittings. Left-hand threads are reserved for fuel-gas type connections, and black is the British oxygen colour, not American.
Storklubba asking:
Charging connection has left hand threads, this question needs clarification.
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