Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3 4XNO.9FLAT found under Metal Expanded by Ryerson Joseph T And Son Inc. The National Stock Number assigned to this part is 5680000564368, and the Federal Supply Class is 5680 Miscellaneous Construction Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 3 4XNO.9FLAT.