Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number J4571-1-2PC4 found under Packing Nut by Crane Company. The National Stock Number assigned to this part is 4730002739497, 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 J4571-1-2PC4.