Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 7X-3178 found under Boltmachine by Carter Machinery Co. The National Stock Number assigned to this part is 5306016923055, 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 7X-3178.