General description 150pcs Threaded Flat Head Rivet Nuts are made of high-quality stainless steel, ensuring sturdiness and durability. These metric thread flat rivets offer superior rust resistance, guaranteeing a long service life. The deep thread design, combined with a knurled surface, enhances fastening effectiveness and prevents slipping during installation. Technical specifications Type: M4 Package size: 150pcs Dimensions: 9mm x 11mm Usage These rivet nuts can be easily installed in various materials, including steel, plastic, and fiberglass, making them versatile for different applications.