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914World.com _ 914World Garage _ PMO Watershield Nut Size?

Posted by: defianty Aug 28 2019, 02:49 PM

It appears they're not metric and therefore I'm lost

Ideally I'd like to get some wingnuts but M5 are too small and M6 too big.

Does anyone know the correct size? Thanks.

IPB Image [/ur

Posted by: jd74914 Aug 28 2019, 05:16 PM

What's the thread major diameter? Likely a 10-24 if M6 is a little too big.

Posted by: defianty Aug 29 2019, 01:16 AM

QUOTE(jd74914 @ Aug 29 2019, 12:16 AM)

What's the thread major diameter? Likely a 10-24 if M6 is a little too big.

@http://www.914world.com/bbs2/index.php?showuser=1659 My vernier caliper says 0.206". Thank you.

Posted by: defianty Aug 29 2019, 04:47 AM

A bit more research and with the help of an engineering friend we've found that the thread is UNC 12-24. My chances of finding a wingnut in that size in the UK are going to be slim.

Posted by: jd74914 Aug 29 2019, 05:24 AM

Wow-didn't even consider that since almost no one in the US uses #12 screws either.

Posted by: defianty Aug 29 2019, 06:33 AM

I've managed to find a source in the UK. They're made to order though so I'll just have to wait a couple of weeks. Fortunately they weren't expensive.

Posted by: sixnotfour Aug 29 2019, 07:49 AM

Attached thumbnail(s)

Posted by: Mark Henry Aug 29 2019, 08:38 AM

Problem is wing nuts will back off from vibration, that's why they come with nylocks.
I'd use some light duty loctite (purple, loctite 222) on the wingnuts so they won't get loose all the time.