>those british threads are crazy. The british pipe threads don't have >any english standard or metric match. And they're impossible to get >here in the States. >not like a standard thread matches a metric one, though, anyways. Well the pipe threads do have a standard, but what seems to catch people out is that they are tapered, so they will make a gas tight seal. And as to the other threads, as someone puts on the bottom of their emails - the great thing about standards is that there are so many to choose from :)) -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist