Re: [CR]Nuts and Bolts with French Threads

(Example: Component Manufacturers:Ideale)

From: <Stronglight49@aol.com>
Date: Sun, 4 Jan 2009 16:32:25 -0500
Subject: Re: [CR]Nuts and Bolts with French Threads
To: <classicrendezvous@bikelist.org>


Fred Rednor wrote:

"This might be little comfort for your predicament, but the Simplex fasteners do have metric theading. They just don't use the same thread dimentions you're accustomed to finding on other bike parts. For example, rather than using the typical 5mm x .8mm bolts, some French parts use .75mm per thread for 5mm bolts..."

Fred Rednor - Arlington, Virginia (USA)

A typical bothersome example of this on earlier Simplex components was the threads of the quick-release wheel skewers. The unique and now desirable older style with the knurled steel end nut, a spring, and then outer plastic wing nut was threaded for .75 mm. Later, with the Campagnolo style levers, they adopted the more common standard metric threads of .80 mm. As far as I know Simplex was the only manufacturer to have ever used the older style of threading on their QR skewers - which makes substitutions basically impossible without risk of damage to the threads.

BOB HANSON, ALBUQUERQUE, NEW MEXICO, USA

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