Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S51010D4L2L5Z found under Switch Push by Electro Mech Co. The National Stock Number assigned to this part is 5930002358990, and the Federal Supply Class is 5930 Switches. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like S51010D4L2L5Z.