Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number M2-1-3 found under Window Observation by Todd Combustion Inc. The National Stock Number assigned to this part is 9340002815100, and the Federal Supply Class is 9340 Glass Fabricated Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like M2-1-3.