Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DIN7985-M4X16 found under Bolt Hex by Lehigh Armstrong Inc. The National Stock Number assigned to this part is 5306012021333, and the Federal Supply Class is 5306 Bolts. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like DIN7985-M4X16.