Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A6-NS4KB-X454 found under Pump Rotary by Clevepak Corp. The National Stock Number assigned to this part is 4320013090974, and the Federal Supply Class is 4320 Power And Hand Pumps. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like A6-NS4KB-X454.