Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SG 18 found under Clamp Hose by Wittek Companies Intl Inc. The National Stock Number assigned to this part is 4730012248718, 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 SG 18.