What kind of thread does the Oxygen hose have?

• A. Left-hand
• B. Right-hand
• C. Fine-thread
• D. Coarse-thread

Answer: (B)

Oxygen hose fittings use right-hand threads, meaning you tighten them clockwise. This follows the standard direction for most threaded hardware and helps ensure a proper seal when connecting to the oxygen regulator and equipment. It also serves as a safety cue to prevent cross-connecting with other gas lines that use different fittings. The other descriptions don’t match how welding oxygen connections are designed—the left-hand threaded option would require turning the opposite way and isn’t the standard for this hose, and “fine-thread” or “coarse-thread” aren’t the typical way these hose fittings are classified.