Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4000552-1 found under Piston Assembly Bra by Meggitt Aircraft Braking Systems. The National Stock Number assigned to this part is 1630011987668, 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 4000552-1.