Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4F24503-101B found under Washer Recessed by A And M Aerospace Inc. The National Stock Number assigned to this part is 5310004710970, and the Federal Supply Class is 5310 Nuts And Washers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 4F24503-101B.