Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 266 28 found under Clip Spark Plug by Clinton Industries Inc. The National Stock Number assigned to this part is 2920008605282, and the Federal Supply Class is 2920 Engine Electrical System Components Nonaircraft. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 266 28.