Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4-50497-5 found under Backing Board Leak by Meggitt Rockmart Inc. The National Stock Number assigned to this part is 1680015008220, and the Federal Supply Class is 1680 Miscellaneous Aircraft Accessories And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 4-50497-5.