Photo 1 of 10 Pcs 1/4"- 20 x 0.45 Threaded Knurled Thumb Nuts Black Knobs Clamping Screws Clamping Male Handle Tightening Screw Knobs Plastic Star Shaped Nut Grip Knob Screw for Umbrella Base Replacement

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Photo 1 of 10 Pcs 1/4"- 20 x 0.45 Threaded Knurled Thumb Nuts Black Knobs Clamping Screws Clamping Male Handle Tightening Screw Knobs Plastic Star Shaped Nut Grip Knob Screw for Umbrella Base ReplacementPhoto 2 of 10 Pcs 1/4"- 20 x 0.45 Threaded Knurled Thumb Nuts Black Knobs Clamping Screws Clamping Male Handle Tightening Screw Knobs Plastic Star Shaped Nut Grip Knob Screw for Umbrella Base Replacement