Author Topic: Thread on a Graduate, Whitworth or UNC?  (Read 1012 times)

Offline BobG

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Thread on a Graduate, Whitworth or UNC?
« on: May 06, 2017, 04:55:49 PM »
Is the thread on a Graduate 1 1/2 x6tpi a Whitworth or UNC thread form?

Offline Ianparkin

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Re: Thread on a Graduate, Whitworth or UNC?
« Reply #1 on: May 06, 2017, 06:31:23 PM »
Whitworth form that's 55 degrees

Offline BobG

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Re: Thread on a Graduate, Whitworth or UNC?
« Reply #2 on: May 06, 2017, 07:03:33 PM »
Cheers, looked like Whitworth but I couldn't find my thread gauges! Now I need to find a tap at a sensible price...