Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 688 1864 3 4 10UNC 2AX3 1 8IN found under Bolt Machine by Huntington Ingalls Incorporated. The National Stock Number assigned to this part is 5306012018869, 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 688 1864 3 4 10UNC 2AX3 1 8IN.