Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4313-1-20-01020 found under Lamp Light Emitting by Sorenson Lighted Controls Inc. The National Stock Number assigned to this part is 6240016025133, and the Federal Supply Class is 6240 Electric Lamps. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 4313-1-20-01020.