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oil feed pipe nipple threads?

Moderators: Curt!, Pa



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Posts: 29

Joined: Sun Oct 22, 2006 5:41 am

Location: Yamanashi Shi, Japan

Post Tue Jun 01, 2010 8:47 am

oil feed pipe nipple threads?

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.


Posts: 386

Joined: Fri Nov 30, 2007 7:24 pm

Post Tue Jun 01, 2010 11:10 am

Re: oil feed pipe nipple threads?

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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