Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 01-435-0311-5 3H6989A NOTE 21 AP found under Worm Pack Assembly by Flowserve Corporation. The National Stock Number assigned to this part is 4810014237224, and the Federal Supply Class is 4810 Valves Powered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 01-435-0311-5 3H6989A NOTE 21 AP.