Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 640-1104 found under Turnbuckle by Apex Tool Group Llc. The National Stock Number assigned to this part is 5340013771489, 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 640-1104.