Arthur asked: snipped: > I understand that the welded-in threaded flange in the oil tank is a BSP > size, either (I suspect) 1.5 inch or 2 inch, but from the above (probably > useless) info. which size is it most likely to be? > The gauge I would like to buy comes with a 1.5in BSP thread size only (and > from the photo of it on t'internet it does look just like the one I'm > replacing (vintage 1995)). A different (and much more expensive and sophisticated > (more to go wrong)) gauge comes in 1.5 inch and 2 inch sizes. >
Looks like inch and a half BSP to me Arthur (see http://www.nccsupplies.com/BSPThreadSizeInformation.asp?m=2 but remember they are quoting 'major diameter' not minor diameter <hole size>) Roger
