Used to ground P.C. boards to steel or aluminum chassis. Annular projecting teeth eliminate the need for serrated or starwashers to make good electrical contact with the circuit foil. Thread sizes #4, #6, and M3, M4.
•Korea Metal Week, Jun 17-20, 2020, South Korea
•Fastener Fair India New Delhi, Sept 4-5, 2020, New Delhi, India
•Manufacturing World Nagoya, Sept 9-11, 2020, Nagoya, Japan