Gas Cylinder Threads

[gap]

Have some mildly buggered threads on my gas cylinder and gas screw. Screw will tighten up, but there is some resistance when turning. Wondering if I can save the expense of buying a tap & die by running a new gas screw with clean threads into the GC a few times. Is the gas screw metal harder than the gas cylinder metal?

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[John R.]

Have some mildly buggered threads on my gas cylinder and gas screw. Screw will tighten up, but there is some resistance when turning. Wondering if I can save the expense of buying a tap & die by running a new gas screw with clean threads into the GC a few times. Is the gas screw metal harder than the gas cylinder metal?

I would go with the tap myself and I DO have a modicum of experience with gas cylinders.

The required tap is a 9/16x32 preferably a 4 flute BOTTOM TAP.

A lot of recoated(potassium dichromate) gas cylinders wind up with excess coating material in the threads and if you don't CLEAN them out with either a M1 or M14 chamber cleaning brush or even a .45 Cal phosphor bronze bore brush on a cleaning rod you could conceivably wind up cross threading the gas cylinder lock screw which is a ROYAL pain in the gluteus maximus.

I hope this will help you with your decision making.

JR

[browningautorifle]

Why don't you just sell him a new one JR?