Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 852644-4 found under Valve Check by Volvo Penta Of The Americas Inc. The National Stock Number assigned to this part is 4820012911377, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 852644-4.