Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D-20303-11 found under Retainer Semiconductor Device by Hy Cal Engineering. The National Stock Number assigned to this part is 5961013646947, and the Federal Supply Class is 5961 Semiconductor Devices And Associated Hardware. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like D-20303-11.