Re: Past discussions

On 4/6/2025 8:17 PM, Jeff Liebermann wrote:

On Sun, 06 Apr 2025 19:50:06 GMT, cyclintom <cyclintom@yahoo.com>
wrote:
 

On Sun Apr 6 11:04:27 2025 AMuzi  wrote:

On 4/6/2025 11:01 AM, cyclintom wrote:

Remember when I said that my bike had 4 mm screws for the water bottle mount? Flunky told you all that I was lying because 5 mm was the standard for all water bottle mounts. Funny thing is that my new Time ULTeam uses 3 mm with a wide head. Perhaps Flunky can suggest why the country of the Tour de France doesn't stick to his "standard"?

>
My $5 says it's not a 3mm screw.
Remove that screw and measure it.
>
More probably a ULS or a 7991 screw, m5x0.8 with a 3mm hex
broach on the head.

 

Part true, The 4 mm head was on a 4 mm screw and the 3 mm head is on a 4 mm screw. Were you correct wouldn't that mean that a 5 mm head would be on a 6 mm screw?

 Wrong (as usual).
The head diameter is always larger than the major diameter across the
threads.  The metric screw size is major diameter.
<https://www.afi.cc/customer/asfain/Hubspot%20Files/Hubspot%20Site/Files%20Uploaded%20from%20Hubspot/Screw%20thread-1.jpg>
For example, a 5mm screw would measure 5mm across the threads.
 Drivel:
New toy.  No more conversion charts.
<https://photos.app.goo.gl/XNfF5h3tNp1KnDNn8>
 

Smart shopper! Very useful, can't live without them.
Meanwhile never say never. Or always:
https://5.imimg.com/data5/SELLER/Default/2021/6/IO/GH/IA/118979890/stainless-steel-allen-grub-screws-1000x1000.jpg
--
Andrew Muzi
am@yellowjersey.org
Open every day since 1 April, 1971