Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number E20 1ID689 found under Lens Assy by Oppenheimer Precision Products Inc. The National Stock Number assigned to this part is 6210015544343, and the Federal Supply Class is 6210 Indoor And Outdoor Electrical Lighting Fixtures. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like E20 1ID689.