Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ST2253-25 found under Insert Screw Thread by United Technologies Corporation. The National Stock Number assigned to this part is 5325010968462, and the Federal Supply Class is 5325 Fastening Devices. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like ST2253-25.