Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A-12C5 PRODUCT CODE 140-4500 found under Stretching And Sealing Machine S by Acme Steel Co. The National Stock Number assigned to this part is 3540002697457, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like A-12C5 PRODUCT CODE 140-4500.