Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number EF-45 25X20 20 IN. DIRECTION found under Paper Gummed by Nashua Corp. The National Stock Number assigned to this part is 9310012793589, and the Federal Supply Class is 9310 Paper And Paperboard. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like EF-45 25X20 20 IN. DIRECTION.