Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 89-M840 found under Press Arbor Hand Op by Gsg Fasteners Llc. The National Stock Number assigned to this part is 3444016279505, and the Federal Supply Class is 3444 Manual Presses. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 89-M840.