Thumb Screws & Knobs | M4 M5 M6 M8 M10 M12 Star Hand Tighten Nuts | Manual Clamping Hardware
The Tighten Nut Plum is a versatile, hand-operated clamping knob designed for secure fastening without tools. Featuring a star-shaped mechanical thread and a black thumb-friendly design, it provides e...
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Questions about this product
- What thread sizes do these thumb knobs come in?
- They are available in M4, M5, M6, M8, M10, and M12 with standard metric coarse pitch. Outer diameter runs roughly 20 to 60mm depending on size. Pick the thread that matches your stud or bolt.
- Where would I use these star hand-tighten nuts?
- They let you clamp and adjust by hand with no tools. People use them on machine panels, jigs, fixtures, and 3D printers or CNC setups. The star knurl gives grip even with oily hands.
- Will these knobs rust in a workshop?
- They are steel with a black oxide finish that adds corrosion resistance. They handle a temperature range of -20C to +120C. Tighten by hand only, around 2 to 5 Nm max, since they are not made for wrench torque.
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