Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S6PHN4-4-57V found under Coupling Half Quick by Snap Tite Inc. The National Stock Number assigned to this part is 4730000056440, 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 S6PHN4-4-57V.