- Knurled M6 nuts designed to facilitate manual adjustment without the need for tools - Made of 304 stainless steel, they offer high durability and resistance to oxidation - Non-slip surface allows for quick and safe assembly and disassembly - Ideal for 3D printers, machine tools, cabinets, toolboxes, and manufacturing projects - Precise measurements: 20 mm diameter, 12 mm height, 1 mm thread pitch, 5 mm knurled thickness - Compatible with standard M6 bolts, studs, and screws - Perfect for applications that require frequent adjustments and long-term reliability