go to DLA webflishttps://www.webflis.dlis.dla.mil/WEBFLI ... earch.aspx
go to your printer manufacturers website and find all the toners for your printer.
get the part number (ie Q6460A) and paste it into the webflis part number box and hit enter
this works with more than just toner.
you can also search for an item by nomenclature (more time consuming) make sure you check the Decoded Characteristics Data block so you can read the description.
you can also search gsa advantagehttps://www.gsaadvantage.gov/advgsa/adv ... rt_page.do
or fedlog at LIWhttps://liw.logsa.army.mil/
and if all else fails type what your looking for in google and add "nsn" to the end