Check the listing for details. WORKPRO 50PC Rivet Nuts 1/4"-20 Flat Head Threaded Insert Stainless Steel Rivnut. Condition: New. Listed at 17.99 USD. SIZE–The size of these rivet nut is 1/4”-20. Total quantity is 50Pcs. Flip-top storage box for easy use and storage.High-Quality Material- These threaded rivets are made of premium stainless steel, ensuring durability and rust resistance for long-lasting performance. Perfect for securely fastening equipment in place.Accurate Threading- Featuring a knurled design with flat head and deep threads, our riv nuts are easy to fix and provide effective anti-slip functionality.Wide Application- Our nutserts perfect for various heavy-duty materials like sheet metal, steel, aluminum, plastic, and fiberglass. Ideal for equipment mounting, vehicle, boat and engine repairs, miscellaneous projects, fabrication.Best after-sale Service - WORKPRO rivnut can be used with regular hand rivet nut tools, perfect installation in just a few simple steps. Please contact me if you have any problems about our product.