Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 42551 found under Cross Pipe by Taylor Dunn Corporation. The National Stock Number assigned to this part is 4730010658426, 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 42551.