Sturdy and Durable: Metric Flat Threaded Rivet Nuts are made of high quality stainless steel. They have superior rust resistance, which can ensure a long service life. Deep Thread: These rivet nuts are knurled with deep thread inside , which are effective in fixing and non-slip. The knurled nut makes it easy to insert into the workpiece. Excellent installation tools:Excellent rivet nut installation tools for make work easier and faster. Size and Quantity: Type: M6; Package Quantity: 100pcs. Widely Used: The rivet nuts can be easily installed in many types of materials, including steel, plastic and fiberglass. Product Description: This product contains 100 carbon steel nuts M6. The knurled nut makes it easy to insert into parts and install on many types of materials, including steel, plastic, and fiberglass. It is a great installation tool to make your job easier and faster. Material: Stainless Steel Type: M6