Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B57859 found under Nut Travel Limit Switch by Orbit International Corp. The National Stock Number assigned to this part is 5310011501893, 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 B57859.