Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number F51 ELA 505 found under Lock Set Mortise by Schlage Lock Co. The National Stock Number assigned to this part is 5340002812194, and the Federal Supply Class is 5340 Hardware Commercial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like F51 ELA 505.