Author Topic: 1971 OIF Thread.  (Read 166 times)

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A10 JWO

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1971 OIF Thread.
« on: 19 January, 2018, 16:54:40 »
Every thread on my A65 is shown as Uni-thread. However the oil feed pipe is held on with a 5/16" Whitworth bolt according to my parts list..21-1973. Can anyone confirm please.

AWJDThumper

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Re: 1971 OIF Thread.
« Reply #1 on: 19 January, 2018, 17:18:13 »
My 1971 parts book shows it as 21-1973 5/16" UNC!

A10 JWO

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Re: 1971 OIF Thread.
« Reply #2 on: 19 January, 2018, 17:54:11 »
I have looked at Dragonflys list and they claim it is Whitworth ???. Don't want to damage anything. Will test both gingerly. Thanks for response.

AWJDThumper

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Re: 1971 OIF Thread.
« Reply #3 on: 19 January, 2018, 18:55:56 »
It's been 5/16 since at least 1969 when BSA changed to unified threads - Dragonfly are simply wrong! Also, both 5/16 BSW and 5/16 UNC are 18 tpi and therefore, to all intents and purposes, identical.

A10 JWO

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Re: 1971 OIF Thread.
« Reply #4 on: 21 January, 2018, 17:45:25 »
Thanks Thumper.