Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B1 K11 1 8INFPT found under Coupling Half Quick Disconnect by Tuthill Corp. The National Stock Number assigned to this part is 4730004184888, 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 B1 K11 1 8INFPT.