Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number QB812 found under Gear Worm Wheel by Altra Holdings Inc. The National Stock Number assigned to this part is 3020009419308, 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 QB812.