Spot goods available immediately: 304 stainless steel knurled cup point set screws complying with **DIN916K** standard, also known as torx socket headless grub screws and anti-loosening stop screws. Made of genuine 304 stainless steel, it features excellent **rust resistance, corrosion resistance** and high hardness, suitable for damp, corrosive and precision equipment working environments. Adopted **concave end knurled design + torx flower-type inner hexagon**, the knurled position enhances anti-slip friction for firm positioning; cup concave end fits closely without damaging workpiece surface. Headless flush mounting keeps assembly flat and neat, good for limiting, positioning and anti-loosening locking. Widely used in precision machinery, molds, instrumentation, electronic equipment, automation hardware and mechanical assembly. Complete specifications in stock, support bulk wholesale and long-term supply, factory direct sales with stable dimensional tolerance and precise thread.