<[email protected]>, Andrews, Kurt <[email protected]> wrote: >However, it is >permitted to use a single >self-tapping screw provided that the thickness of the metal part at the >point where the screw is >threaded into it is a minimum of 0,9 mm for a screw of the thread-forming >type and 1,6 mm for >a screw of the thread-cutting type.
The trick is to do that. The 'two screw' thing is a 'sacred cow' (perhaps copied from IEC/EN60335-1 without too much insight) that people avoid if at all possible. AFAICS, a bolt, serrated washer and nut is even more reliable than a thread-forming screw. -- Regards, John Woodgate, OOO - Own Opinions Only. Phone +44 (0)1268 747839 Fax +44 (0)1268 777124. http://www.jmwa.demon.co.uk Why not call a vertically- applied manulo-pedally-operated quasi-planar chernozem-penetrating and excavating implement a SPADE? ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: [email protected] Dave Heald [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on "Virtual Conference Hall,"
