Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 81.98126-0037 found under Coupling Half Self Sealing by Man Truck And Bus Ag. The National Stock Number assigned to this part is 4730006139863, 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 81.98126-0037.