Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 417-4-01808 found under Semiconductor Device Thyristor by British Aerospace Inc. The National Stock Number assigned to this part is 5961001063698, 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 417-4-01808.