Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 243-050 018 found under Key Machine by Peterson Builders Inc. The National Stock Number assigned to this part is 5315013367804, and the Federal Supply Class is 5315 Nails Machine Keys And Pins. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 243-050 018.