Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SN528 found under Screen Ventilator C by Ambac International Corporation. The National Stock Number assigned to this part is 2540007002620, and the Federal Supply Class is 2540 Vehicular Furniture And Accessories. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like SN528.