Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 590004 found under Adapter Straight Tube To Boss by Alliant Techsystems Operations Llc. The National Stock Number assigned to this part is 4730011623142, 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 590004.