Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1N999 found under Semiconductor Devic by Solid State Devices Inc. The National Stock Number assigned to this part is 5961008685745, and the Federal Supply Class is 5961 Semiconductor Devices And Associated Hardware. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1N999.