Quote:
Originally Posted by Tinkerer
Yes Bedford 330 . I only ask for the thread size as I'm putting a oil pressure gauge in and need the correct tee piece . really don't want to be tightening up the wrong one as the only diffence between NPT and BSPT is about 5 degree pitch if I remember .
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BSP is a whitworth thread form - 55 degree angle with radiused tips; NPT is a UN thread form - 60 degree angle and 'square' tips. Some sizes have the same pitch but others don't.
My guess would be 1/4" NPT for your gauge.