Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 139D072 found under Filter Assembly Fluid by Stewart And Stevenson Power Products. The National Stock Number assigned to this part is 4330012126893, and the Federal Supply Class is 4330 Centrifugals Separators And Pressure And Vacuum Filters. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 139D072.