Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number FSRK CAS-4 found under Parts Kit Quick Disconnect Coupling Assembly by All American Hose Llc. The National Stock Number assigned to this part is 4730012620752, 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 FSRK CAS-4.