On Mon, 21 Feb 2005 23:24:53 -0500, Stephen D. Barnes wrote: > Industry standard thread size is 10-32 for 19" rack rails. Here in the UK, the captive nuts in the rack rails are M6 thread. Dan -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist