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Re: Old-style self-locking nuts
I've seen similar nuts called prevailing torque nuts.
'91 200q 264k km
From: Phil Payne <email@example.com>
To: firstname.lastname@example.org <email@example.com>
Date: Friday, December 18, 1998 2:00 PM
Subject: Old-style self-locking nuts
>I'm sure someone on the list can help me out ...
>The self-locking nuts used on older Audi manifolds were of a specific
>design - there was a slot cut in the side of the top of the nut creating
>a kind of spring that pressed on the thread harder than the rest of the
>I took a set off Roger Galvin's car last weekend, and laughed a little
>when he tried to re-use them - you can tighten them to 30 Nm, tap the
>manifold with a hammer, and remove them at an undoing torque below 20
>Nm. I fitted new nuts.
>Now - the question. What are these (old) nuts called?