Ron L
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- Joined
- Feb 27, 2004
- Messages
- 3,229
I'm trying to locate the proper part number or thread form/pitch for the drain plug on the later alloy or steel oil tank on the P11/P11A. The '66-'68 Master parts book only shows P/N 13765 and lists it as fitting "all but P11/P11A". There is no additional listing for a drain plug for P11/P11A. Is this the same plug? From what sparse information I can find, P/N 13765 is 3/8 CEI (26 TPI). Using a thread pitch gauge, the couple plugs I have measure 28 TPI. I don't have confidence in this reading as 28 TPI is hard to read accurately on a simple thread pitch gauge. I have an oil tank plug from a 650 Triumph which is listed a 1/8 BSP (28 TPI), but it will not fully thread into any of the three tanks I have. It threads easily into the tank for the first 1/4", then stops dead. A 3/8 CEI nut will not thread onto the P11 drain plug I have.
Can anyone tell me if P/N 13765 is the correct one for P11/P11A oil tanks? If not what is the correct thread form/pitch? I can make one on my lathe if I know the thread form.
Can anyone tell me if P/N 13765 is the correct one for P11/P11A oil tanks? If not what is the correct thread form/pitch? I can make one on my lathe if I know the thread form.