Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 643233300 found under Ratchet Wheel by Duffnorton Co Inc. The National Stock Number assigned to this part is 3020011501695, 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 643233300.