Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B851-6-74851-2 found under Transmitter Prop Elevation by Simmonds Precision Products Inc. The National Stock Number assigned to this part is 5420004557900, and the Federal Supply Class is 5420 Bridges Fixed And Floating. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like B851-6-74851-2.