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JW Winco Stainless Steel 304 Hand Knob, Threaded Stud, M8 x 1.25 Thread Size x 40mm Thread Length, 40mm Head Diameter (Pack of 1): Male Fluted Knobs: Amazon.com: Industrial & Scientific
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Amazon.com: Morton - PHK-255 Plastic Hand Knobs with Steel Screws, Metric Size, M12 x 1.75 Thread Size, 40mm Stud Length : Industrial & Scientific
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JW Winco Glass Filled Nylon Plastic Quick Release Hand Knob with Steel Hub, Threaded Through Hole, M10 x 1.5 Thread Size, 34mm Thread Depth, 50mm Head Diameter (Pack of 1): Female Fluted
Innovative Components Star Knob with Screw, 1/4-20 Thread Size, 1.50"L, Steel GN4C15005S3--21 | Zoro
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Amazon.com: ZLYY Black M8 x 60mm Thread Replacement Star Hand Screw-on Knobs, Hex Quick Clamping Bolt Knob, Pack of 4 Set : Industrial & Scientific
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Slim Metal Potentiometer Knob - 10mm Diameter x 10mm - T18 : ID 2058 : $0.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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