Extrusion of screw holes

[caddone]

Is there a good reference to design extruded holes for tapping holes for screws. Here is an image of the hole I am referring to.

The one that goes right thru the middle of the extrusion.

http://www.hercules-online.com/catalog/doors_and_windows/3/aluminum_extruded_profile_136.html

Thx
C1

 

[rb1957]

something like wall thickness needs to be 3x thread depth ?

 

[MintJulep]

Like this?

 

[TVP]

Here is some good design information on holes for screws, etc:

http://www.aluminiumdesign.net/design-support/joining-aluminium/

http://aluminium.matter.org.uk/content/media/pdf/talat/2302.pdf

 

[caddone]

Thank you guys. I love this forum.
Kudos to u both