190-pc kit includes 12 different SAE and metric rivet nuts.
Heavy-duty zinc-plated steel nuts resist corrosion and have a knurled collar so they won't turn once inserted. Nuts have thicker sidewalls for heavy-use applications. May require larger holes than standard rivet nuts.
Kit includes: 20 each (6-32, 8-32, 10-24, 10-32, M4, M5), 15 each (1/4"-20, M6), and 10 each (5/16"-18, 3/8"-16, M8, M10) in a plastic case.