Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S603 found under Swivel Hose by Gregory Inc. The National Stock Number assigned to this part is 3920000442180, and the Federal Supply Class is 3920 Material Handling Equipment Nonself-Propelled. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like S603.