M10 Plastic Five‑Star Thumb Screws – Hand Clamping Knob Bolts, 25‑80mm Lengths (Black)

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Sale price$11.22 USD
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In stock (500 units), ready to be shipped

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Description

🖐️ M10 Plastic Five‑Star Thumb Screws – Hand Clamping Knob Bolts, 25‑80mm Lengths

If you’re constantly reaching for a wrench to adjust machine guards, jigs, or equipment panels, these plastic star‑head thumb screws will save you time and frustration. The five‑star (knob) head gives you plenty of leverage for hand tightening, and the M10 carbon steel threaded rod is available in lengths from 25mm up to 80mm. The head is made from tough black plastic with a comfortable grip, and the steel screw is galvanized for rust resistance. Whether you need to frequently access electronic enclosures, adjust conveyor belt guides, or secure temporary fixtures, these hand clamping knob bolts let you do it tool‑free.

✨ Why Choose These Plastic Five‑Star Hand Knob Bolts

  • Tool‑free manual operation – The star‑shaped plastic head provides excellent finger grip, so you can tighten or loosen these thumb screws instantly without any tools.
  • Durable plastic + carbon steel build – Head is high‑quality black plastic with good toughness and impact resistance. Screw is carbon steel with galvanized finish – high hardness, rust‑proof, and sturdy.
  • Wide length range (25–80mm) – Choose exactly what you need: 25, 30, 35, 40, 45, 50, 60, 70, or 80mm thread length. Perfect for thin panels or thick mounting blocks.
  • Clean, precise M10 threads – Even pitch and neat thread profile for consistent tightening force and smooth engagement with standard M10 nuts or tapped holes.
  • Ergonomic 50mm head diameter – Large enough for a solid grip, but not bulky. The five‑star shape naturally fits your hand.
  • Made for frequent adjustments – Ideal for electronics, machinery access panels, jigs, and any spot where you open and close regularly.

📏 Technical Specifications – M10 Thumb Screws with Star Knob Head

Head Style Five‑star / Star knob head (plastic) – manual grip
Head Material High quality plastic (plywood grade, tough & impact resistant)
Head Diameter 50mm
Screw Material Carbon steel, galvanized surface (rust‑proof, high hardness)
Thread Size M10 (metric, 10mm diameter)
Thread Length Options 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 60mm, 70mm, 80mm (select from dropdown)
Drive Style Manual / hand tightening only – no tools needed
System of Measurement Metric
Color Black (head) + silver galvanized screw
Country of Origin China
Type Thumb screw / hand clamping knob bolt

❔ Frequently Asked Questions

Can I use these outdoors? Will the plastic head crack in the sun?

The plastic head is made from tough, impact‑resistant material that holds up well in indoor and covered outdoor environments. For continuous direct sunlight (UV exposure), the plastic may eventually become brittle over years of use – but for most workshop, garage, or indoor machinery applications, it’s perfectly fine. The carbon steel screw is galvanized, so it resists rust in normal conditions.

What’s the maximum torque I can apply by hand?

These are designed for hand tightening only. The five‑star shape gives you good leverage, but the plastic head is not meant for wrenches or pliers. Typical hand torque (about 5–8 Nm) is sufficient for most clamping tasks like securing access covers, light machinery guards, or jig stops. If you need high clamping force, use a steel hex bolt instead.

Do these come with matching M10 nuts or washers?

This listing includes the thumb screw only. However, M10 nuts, lock washers, and flat washers are standard hardware store items. If you need a complete set, contact our customer service – we can add nuts to your order for a small extra charge.

How do I choose the correct thread length for my panel?

Measure the total thickness of the material you’re clamping (panel + any washers). Pick a thread length that’s at least 2‑3mm longer than that thickness so you can fully engage a nut or have enough thread bite into a tapped hole. For example: a 20mm thick panel works well with a 25mm thread length. We offer lengths from 25mm up to 80mm.

Are these threads compatible with standard M10 nuts?

Yes, the thread is standard metric M10 (coarse pitch, typically 1.5mm). They fit perfectly with any standard M10 nut or tapped hole. The threads are clean and evenly pitched for smooth engagement.

Can I get other colors besides black?

Currently this model is only available with a black plastic head. The carbon steel screw is silver galvanized. If you need color‑coded heads, check our other listings for aluminum thumb screws with anodized colors.

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