Board index Flathead Power-Technical Questions, Answers, and Suggestions Knuckles oil feed pipe nipple threads?

oil feed pipe nipple threads?

Post Tue Jun 01, 2010 8:47 am

Posts: 29
Location: Yamanashi Shi, Japan

can anyone tell me what size the threads are in the crankcase for the "oil feed pipe nipple" oem part number 3615-36 used on 36-41 Knuckleheads? this is for the fitting that runs to the vent on the oil tank.

-experience is a wonderful thing. It enables you to recognize a mistake when you make it again.

Post Tue Jun 01, 2010 11:10 am

Posts: 391
The thread is 1/8 NPT or national pipe thread tapered, a standard US thread for plumbing connections that is in theory self-sealing. Care must be taken to not over-tighten this type thread as the taper can cause cracking in the mating part.

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