Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number STC 2177 found under Transistor by Silicon Transistor Corp. The National Stock Number assigned to this part is 5961004712286, 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 STC 2177.