Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 531663-1 found under Shaft Bearing Actua by Honeywell Aerospace. The National Stock Number assigned to this part is 1680000979209, 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 531663-1.