Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BTK-70690S found under Solar Cell Panel Assembly by Bren Tronics Inc. The National Stock Number assigned to this part is 6117016069497, and the Federal Supply Class is 6117 Solar Electric Power Systems. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like BTK-70690S.