Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number E4X10EM found under Pin Spring by Mecanindus. The National Stock Number assigned to this part is 5315142010557, and the Federal Supply Class is 5315 Nails Machine Keys And Pins. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like E4X10EM.