10 Pack 1/4-20 Black Star Knobs Grip Knob Screw Hand Knob Threaded Knurled Thumb Nuts Female Threaded Hexagon Head Thru Knobs for Mechanical Instrument, Umbrella Base Replacement

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【Durable Material】You will get 10 pieces of black threaded knurled thumb nuts, featuring a carbon steel thread for wear resistance and rust prevention, paired with a smooth plastic knob for lightweight durability. 【Precise Size】With a 1/4-20 thread size, 22mm knob diameter, and 20mm screw length, these black star knobs provide a secure and firm clamping action. The exact dimensions ensure compatibility with a wide range of equipment and easy adjustment for tightening control. 【Ergonomic Design】The star-shaped clamping knob offers an ergonomic grip, enhancing control and precision during use. The hexagon head design allows for comfortable handling and effective tightening without causing hand strain or slippage. 【Easy Installation】The black knobs clamping screws simplify heavy-duty clamping jobs, enabling quick and hassle-free installation. The smooth surface finish ensures seamless movement and secure fastening, making it user-friendly for various projects. 【Versatile Application】Ideal for multiple uses, including workshop equipment fixation, woodworking jigs, and furniture modification. The hex-shaped clamping knob’s design fits tight spaces and provides reliable fastening in both industrial and household settings.