Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NITON XLT 797W found under Spectrometer Diffraction Grating by Thermo Scientific Portable. The National Stock Number assigned to this part is 6650015399580, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like NITON XLT 797W.