Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 99-411-1B2-17818 found under Switch Push by Aerospace Optics Inc. The National Stock Number assigned to this part is 5930012597413, and the Federal Supply Class is 5930 Switches. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 99-411-1B2-17818.