Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NAS1564J10-4 found under Reducer Body Tube by National Aerospace Standards. The National Stock Number assigned to this part is 4730012068589, 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 NAS1564J10-4.