Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CS-0001-31 found under Plug Tube Repair by Enerquip Llc. The National Stock Number assigned to this part is 4730002890595, 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 CS-0001-31.