Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CLC-999R0522 PCS.30 31 And 44 found under Interstage Assembly Pump by Lowe Charles Co The. The National Stock Number assigned to this part is 4320010374945, 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 CLC-999R0522 PCS.30 31 And 44.