Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 58-18 EXP found under Tube Expander by The Graham Corporation. The National Stock Number assigned to this part is 3441011687668, and the Federal Supply Class is 3441 Bending And Forming Machines. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 58-18 EXP.