B-50 oil strainer

[marshalle]

Can anyone tell the tread size for oil strainer up into frame front downtube? I measure about, 7/8 X 20. I need to cleen up threads with a tap.

[btf]

Do you have a part number for it? I can check for sure if you do.

Otherwise, I would suggest that 7/8"-20 is a moderately common size in the BSCycle thread pattern and that you would be correct (I'm just not 100% positive) :)