Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 99-6030857 found under Fitting Special by Nato Stock Number Assigned By An. The National Stock Number assigned to this part is 4730004717360, 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 99-6030857.