Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ST90455 found under by Kell Strom Tool International Inc. The National Stock Number assigned to this part is 3020004184838, and the Federal Supply Class is 3020 Gear Pulley Sprocket And Transmission Chain. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like ST90455.