Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MKB-504-4C found under Capacitor Fixed Metallized Paper Plastic Dielectri by Chicago Condenser Corporation. The National Stock Number assigned to this part is 5910012570450, and the Federal Supply Class is 5910 Capacitors. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MKB-504-4C.