Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AF-490 found under Breather by Deluxe Products Div Walker Mfg Co. The National Stock Number assigned to this part is 2520008060007, and the Federal Supply Class is 2520 Vehicular Power Transmission Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like AF-490.