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From: "Marvin Kaye" <marv@lancaironline.net>
Subject: Re: [FlyRotary] Re: Plugging oil outlet in rear housing
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Date: Sun, 12 Jan 2003 00:37:57 -0500
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Posted for "Richard M. Martin" <martinrm@ncplus.net>:

The size of the oil pressure sensor hole is 1/8-28 B.S.P.  My metric tap and
die set (MATCO #6312) includes both the tap and die in that size.  I used
the tap to chase the threads in my 12A.

Anyone know what B.S.P. stands for?

Richard Martin


>>>On my engine, the oil pressure sensor is plugged there. I do not know
the thread size.<<<

[I would guess that BSP stands for British Standard Pipe, and think that the 
corresponding NPT (National Pipe Thread) size is 1/8-27.  Go figure.    <Marv> 
  ]