Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 504S1ZEN05 found under Needle Upholsterers by C S Osborne And Company. The National Stock Number assigned to this part is 8315002866136, and the Federal Supply Class is 8315 Notions And Apparel Findings. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 504S1ZEN05.