Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number C838M found under Disk Upper by Opw Fueling Components Inc. The National Stock Number assigned to this part is 2590005637663, and the Federal Supply Class is 2590 Miscellaneous Vehicular Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like C838M.