Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4D1998 found under Strainer Element Sediment by William Adams Pty Ltd. The National Stock Number assigned to this part is 4730004788205, 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 4D1998.