Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number LL1K4 found under Coupling Half Quick by Tuthill Corp. The National Stock Number assigned to this part is 4730000236174, 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 LL1K4.