Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 581 12 91-01 found under Adapterfluid Filter by Electrolux Construction Products Inc. The National Stock Number assigned to this part is 2910016750241, and the Federal Supply Class is 2910 Engine Fuel System Components Nonaircraft. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 581 12 91-01.