Oil guage cone taper question

Hi I want to get a short flexi pipe made to connect the guage to the old pipe . I need to know the angle of the cone on the back of the gauge . Any know ?
Thanks Jim

It should be the same as the one on the oil filter, probably a standard listing in Machinery’s Handbook. I measured an old connection hose and it is about 68 degrees.

Thanks Rob . I thought it would be an easy standard size but the company I use do pneumatic and hydraulic hoses and not really car stuff.