Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number YB1587 1028 found under Retainer Capacitor by Raytheon Company. The National Stock Number assigned to this part is 5910003925904, 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 YB1587 1028.