Two tech sites- might be of use

[Jimbo]

Morning all,

The query for nut and bolt info and the response, reminded me of these two sites which I found when I researched for some writing I was doing. Have a look, you never know....

http://www.hydraulicsupermarket.com/start.html is all about hydraulics

http://www.engineeringtoolbox.com/ has stuff about just about every aspect of engineering under the sun.

HTH,

Jim