Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 266860-717PC1605 found under Washer Flat by Otis Elevator Co. The National Stock Number assigned to this part is 5310004341425, and the Federal Supply Class is 5310 Nuts And Washers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 266860-717PC1605.