Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DY4643-1 found under Relay Element Plug by Dynastat Inc. The National Stock Number assigned to this part is 6110005875241, and the Federal Supply Class is 6110 Electrical Control Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like DY4643-1.