Charlie,
For your benefit and the rest of the list, I have dug into the dusty archives of several British car companies and have learned a lot about British pipe threads. B = British S = Standard P = Pipe P = Parallel (Yes, P can mean more than one thing…) T = Tapered BSPT threads are found on the Yanmar block. The oil pressure sensor fitting is a 1/8” tapered fitting, designated BSPT. These are pipe threads where pressure-tightness is made through the mating of two threads together. They always use a taper male thread, but can have either parallel or taper female threads. International standards require all female threads to be parallel. (This fact has helped my search quite a bit). BSPP threads are parallel pipe threads used where a pressure-tight joint is achieved by the compression of a soft material (such as an O-ring seal or a washer) between the end face of the male thread and a socket or nipple face, with the tightening of a backnut. The last thing you want are your nipples to leak! So now I have found an elbow that will work in my situation. This item should fit the bill and keep my sensor clear of the alternator belt. https://www.amazon.com/Elbow-Degree-Fitting-Female-Thread/dp/B01M4P10U2/ref=sr_1_16?s=hi <https://www.amazon.com/Elbow-Degree-Fitting-Female-Thread/dp/B01M4P10U2/ref=sr_1_16?s=hi&ie=UTF8&qid=1491387086&sr=1-16&keywords=BSP+elbow> &ie=UTF8&qid=1491387086&sr=1-16&keywords=BSP+elbow So now, whether you’re working on a Japanese engine or a British sports car, you know the difference between BSPT and BSPP threads. Jake Jake Brodersen C&C 35 Mk-III “Midnight Mistress” Hampton VA From: CnC-List [mailto:[email protected]] On Behalf Of Charlie Nelson via CnC-List Sent: Wednesday, April 5, 2017 08:57 To: [email protected] Cc: [email protected] Subject: Re: Stus-List Oil Pressure Gauge Install Geez--this list is starting to sound like a gathering of English sports car buffs (I used to house a classic MG and a Aston-Martin in my large garage with only a single wide door--the door was not a problem since the owners spent so much time fixing their cars, they hardly ever left the garage!). Anyhow, for the benefit of the other ignorant list members, can one of you explain the acronyms BSPT, BSPP, etc.? It must have something to do with the British 'heh'? Charlie Nelson Water Phantom C&C 36 XL/kcb [email protected] <mailto:[email protected]>
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