Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2478-300 found under Trap Drain Plumbing Fixture by Flagg Stanley G And Co Inc. The National Stock Number assigned to this part is 4510002873656, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 2478-300.