Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 820 1385990 1 50NPS 70 30 found under Thread Piece Union by Electric Boat Corporation. The National Stock Number assigned to this part is 4730015123124, and the Federal Supply Class is 4730 Hose Pipe Tube Lubrication And Railing Fittings. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 820 1385990 1 50NPS 70 30.