Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 28345-312 found under Semiconductor Devic by Marconi Electronics Inc. The National Stock Number assigned to this part is 5961004313953, 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 28345-312.