Thank you for selecting Aerospace Aviation 360 for AT4003A by Nkk Switches Inc under Electromechanical Switches. We are proud to be an ASAP Semiconductor owned and operated website, a leading distributor of aviation and aerospace part numbers like AT4003A. To help us better understand your parts requirements, please fill out an RFQ form for part number AT4003A with your details, and our customer executive will respond to your RFQ in 15 minutes or less.