Niton Nut Flat Threaded Rivet Nut Insert 150pcs Description: Made of carbon steel, durable, durable, ensuring high strength and load-bearing threads. Set of rivet nuts M3 M4 M5 M6 M8 M10 M12. Easy and convenient to install and use. Suitable do fixing the tub, containers at the tailgate and anchoring on the wheel arches. Application: Many kinds of heavy materials including sheet metal, stal, aluminum, fiberglass, etc. Specification: M3 Inner diameter approximately 4,9 mm/0,19 inches; outer diameter approximately 8 mm/0,31 inches; height: approximately 9 mm/0,35 inches M4 Inner diameter approximately 5,9 mm/0,23 inch; outer diameter approximately 9 mm/0,35 inch; height: approximately 10 mm/0,39 inch M5 Inner diameter approximately 6,9 mm/0,27 inches; outer diameter approximately 10 mm/0,39 inches; height: approximately 13 mm/0,51 inches M6 inner diameter approximately 8,9 mm/0,35 inch; outer diameter approximately 12 mm/0,47 inch; height: approximately 15 mm/0,59 inch M8 Inner diameter approximately 10,9 mm/0,43 inch; outer diameter approximately 14 mm/0,55 inch; height: approximately 18 mm/0,71 inch M10 Inner diameter approximately 12,9 mm/0,51 inch; outer diameter approximately 16 mm/0,63 inch; height: approximately 21 mm/0,83 inch M12 Inner diameter approximately 14,9 mm/0,59 inch; outer diameter approximately 18 mm/0,71 inch; height: approximately 24 mm/0,94 inch The package includes: 120 pieces Packaging: 50 x M4 rivet nuts, 35 x M5 rivet nuts, 15 x M6 rivet nuts, 10 x M8 rivet nuts, 10 x M10 rivet nuts. Pack of 180 pieces: 50x M3 steel ribbed nuts, 40 M4 steel ribbed nuts, 30 M5 steel ribbed nuts, 25 M6 steel ribbed nuts, 20 M8 steel ribbed nuts, 10 steel ribbed nuts, 5 M12 steel ribbed nuts. Pack of 300 pieces: 90x M3 steel ribbed nuts, 65 x M4 steel ribbed nuts, 50 M5 steel ribbed nuts, 40 M6 steel ribbed nuts, 30 M8 steel ribbed nuts, 20 steel ribbed nuts, 5 M12 steel ribbed nuts. 150 pcs. Packaging: 40 pcs. M4x11mm rivet nuts, 40 pcs. M5x13mm, 30szt M6x15mm, 20szt M8x18mm, 15szt M10x21mm, 5szt 9mm