[USMA:26158] need metric equivalent

[Jim Elwell]

We are designing a new terminal that will have some hand and/or shoulder 
straps on the sides for the user. These will need to be removable, and will 
vary a bit from customer to customer.

The obvious way of doing this is a threaded hole, similar to what is on the 
bottom of most cameras, where a machine screw with a large, knurled head 
goes through a grommet on the strap and screws into the case.

Unfortunately, the threaded hole on the bottom of cameras is a 1/4-20 
(quarter inch diameter, 20 threads per inch). This is a very, very common, 
and there are huge numbers and varieties of accessories designed for it.

Is anyone familiar with something similar, but metric, used on products in 
metric countries?

Jim Elwell, CAMS
Electrical Engineer
Industrial manufacturing manager
Salt Lake City, Utah, USA
www.qsicorp.com