190piece flat head rivet nut assortment with six sizes 3mm x 45 pcs, 4mm x 40 pcs, 5mm x 40 pcs, 6mm x 30 pcs, 8mm x 20 pcs, 10mm x 15 pcs Stored in a transparent 21 x 11 x 3 cm portable box for easy organization and access during furniture DIY or construction projects Vertical thread design for secure fastening Flat vertical threads provide strong antislip performance Straightforward installation suitable for a range of manufacturing applications including automotive and appliance assembly Long lasting aluminum construction Made from robust aluminum material Cylinder hollow rivet nuts maintain integrity through repeated use Resists erosion in diverse working environments from shipbuilding to fitness equipment manufacturing Multiindustry application flexibility General use across furniture assembly, home appliances, electrical equipment, maintenance, and aviation sectors Delivers reliable threaded connections where traditional fasteners cannot reach use scenarios Flush mounting of brackets or hardware on cabinet frames or thin furniture panels where a concealed nut is desired Retrofit or of appliance enclosures or automotive interior panels where access is limited Mounting of components on equipment housings, fitness machines, or marine hardware where strong, durable threaded connections are required