Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ST 1 4 20X1 2 found under Bolt Machine by A P M Hexseal Corporation. The National Stock Number assigned to this part is 5306013335485, 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 ST 1 4 20X1 2.