Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 12873241 PIECE 3 found under Pump Cooling System Engine by Stewart And Stevenson Power Inc. The National Stock Number assigned to this part is 2930013137090, and the Federal Supply Class is 2930 Engine Cooling System Components Nonaircraft. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 12873241 PIECE 3.