Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 13139 found under Parts Kit Cylinderx by Eaton Aerospace Ltd. The National Stock Number assigned to this part is 1630007304051, and the Federal Supply Class is 1630 Aircraft Wheel And Brake Systems. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 13139.