Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 46321055 found under Chain Roller by W B Arnold Company Inc. The National Stock Number assigned to this part is 3020012188040, 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 46321055.