In a message dated 4/21/2001 9:31:55 AM, Allan wrote: <<"A quadruple thread has four single threads starting at points 90 degrees apart. A multiple thread is used to increase the lead of a screw." (p 355) Clear as mud, right? <grin>">> Now you have me worried cause I unnerstans the uses of "multiple threaded" thingees! :-) Jim Bryant (FL)
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