Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number KP1820-A-S06 2056AS0328-1 found under Valve Relief Aircra by Wandfluh Ag Hydraulikelektronik. The National Stock Number assigned to this part is 1710015504189, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like KP1820-A-S06 2056AS0328-1.