Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SMT-600-W ITEM 28 found under Filter Unit Fluid Pressure by Sage Technologies Inc. The National Stock Number assigned to this part is 4930014821796, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like SMT-600-W ITEM 28.