Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ST261 found under Cutter Set Valve Se by Cummins Inc. The National Stock Number assigned to this part is 5180003453709, and the Federal Supply Class is 5180 Sets Kits And Outfits Of Hand Tools. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like ST261.