What thread sizes do these knobs come in?

They cover metric threads from M4 up to M10. Knob diameters scale up too, roughly 25mm for the small ones and around 35mm for M10. Pick the size that matches your machine thread.

What are these star knobs good for?

They're made for tool-free clamping you adjust by hand. The star shape gives a non-slip grip for quick tightening and loosening. People use them on jigs, fixtures, 3D printer parts, and access panels.

Why bakelite instead of metal or plastic?

Bakelite (phenolic resin) is a good electrical insulator and handles heat well, around -40°C to +120°C. It also resists oils and solvents. The black oxide threaded inserts give a strong, corrosion-resistant grip on the threads.

Thumb Screws & Knobs | M4-M10 Black Bakelite Hand-Tighten Nuts | Star Mechanical Clamping

Name: Thumb Screws & Knobs | M4-M10 Black Bakelite Hand-Tighten Nuts | Star Mechanical Clamping
Brand: Compel
SKU: FAST-00152
Price: 16.99 USD
Availability: InStock

Stock #:TBS-05729

SKU:FAST-00152

Thumb Screws & Knobs | M4-M10 Black Bakelite Hand-Tighten Nuts | Star Mechanical Clamping - Image 1

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Questions about this product

What thread sizes do these knobs come in?: They cover metric threads from M4 up to M10. Knob diameters scale up too, roughly 25mm for the small ones and around 35mm for M10. Pick the size that matches your machine thread.
What are these star knobs good for?: They're made for tool-free clamping you adjust by hand. The star shape gives a non-slip grip for quick tightening and loosening. People use them on jigs, fixtures, 3D printer parts, and access panels.
Why bakelite instead of metal or plastic?: Bakelite (phenolic resin) is a good electrical insulator and handles heat well, around -40°C to +120°C. It also resists oils and solvents. The black oxide threaded inserts give a strong, corrosion-resistant grip on the threads.

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Black bakelite hand-tighten thumb nuts with star-shaped handles in M4-M10 sizes for mechanical clamping and manual adjustment applications.

Thumb Screws & Knobs | M4-M10 Black Bakelite Hand-Tighten Nuts | Star Mechanical Clamping

Price$16.99

Rating4.8

Sold197+

Stock In stock

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Alternative

Black thumb nuts with star-shaped handles for manual tightening, available in various thread sizes including M4, M5, M6, M8, M10, and M12.

Thumb Screws & Knobs | M4 M5 M6 M8 M10 M12 Star Hand Tighten Nuts | Manual Clamping Hardware

Price$14.99

Rating4.9

Sold55+

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Alternative

Stainless steel thumb screws with Z-handle bakelite knobs in M4, M5, M6, M8, and 1/4 UNC thread sizes for adjustable tightening.

Adjustable Thumb Screws | M4-M8 Stainless Steel Z-Handle | Bakelite Hand Knob

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Rating5.0

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Alternative

Set of knurled thumb screws with high step heads in various metric sizes (M3 to M10) for hand-tightening applications like curtain wall glass adjustment.

M3-M10 Thumb Screws | Knurled Hand-Tighten Bolts | Curtain Wall & Glass Adjust

Price$17.99

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These black bakelite hand-tighten nuts combine classic mechanical function with user-friendly operation. The star-shaped thumb design and durable phenolic resin material allow for secure clamping and frequent adjustment without tools, making them ideal for fixtures and prototypes. Features and Benefits - Bakelite (phenolic resin) construction - Provides excellent electrical insulation, heat resistance, and a smooth, durable finish. - Ergonomic star/thumb design - Offers a comfortable, non-slip grip for easy hand tightening and loosening. - Tool-free operation - Enables quick adjustments, fine-tuning, and maintenance in the field or workshop. - Black oxide threaded inserts (M4-M10) - Ensure strong, corrosion-resistant mating with corresponding machine threads. Applications - Adjustable knobs on jigs, fixtures, and 3D printer components. - Manual clamping mechanisms for light-duty woodworking or hobbyist projects. - Access panels and inspection covers on enclosures and machinery requiring frequent access.

Thread sizes: M4, M5, M6, M8, M10. Material: Bakelite (phenol formaldehyde). Drive type: Hand tighten / manual. Finish: Black. Product type: Thumb nut / clamping knob. Profile: Star / plum shape. Thread type: Metric. Knob Diameter (Approx.): M4/M5: ~25mm, M6/M8: ~30mm, M10: ~35mm (estimated from common designs). Thread Sizes: M4, M5, M6, M8, M10. Material (Body): Bakelite (Phenolic Resin). Operating Temperature Range: Approx. -40°C to +120°C (typical for phenolic resin). Thread Pitch (Standard Metric Coarse): M4: 0.7mm, M5: 0.8mm, M6: 1.0mm, M8: 1.25mm, M10: 1.5mm. Application: Clamping, fixturing, mechanical adjustment, manual fastening. Chemical Resistance: Good resistance to oils, solvents, and weak acids. Color: Black. Drive Type: Hand-tightened, no tool required. Electrical Insulation: Yes (Bakelite is an electrical insulator). Flammability: Self-extinguishing (typical for phenolic resin). Mechanical Strength: Moderate, suitable for hand-tightened clamping loads. Product Type: Hand-Tighten Knob / Thumb Nut / Star Knob. Style: Plum/Star shaped handle for manual gripping. Q: What sizes are available for these black bakelite thumb nuts? A: These hand-tighten thumb nuts are available in several common metric thread sizes: M4, M5, M6, M8, and M10. The black plum bakelite material and star-shaped design provide a comfortable grip for manual tightening and adjustment.. Q: How durable is the bakelite material used for these thumb nuts? A: Bakelite is a durable, thermosetting plastic known for good mechanical strength, heat resistance, and electrical insulation. These thumb nuts are robust for hand-tightened applications, offering a solid feel and resistance to wear in mechanical and clamping uses.. Q: Can these thumb nuts be used on standard threaded rods and bolts? A: Yes, these thumb nuts are designed to fit standard metric threaded rods, bolts, and studs in the specified M4 to M10 sizes. They are ideal for applications where frequent manual adjustment or tool-free fastening is desired, such as on knobs, clamps, or fixtures.. Q: What kind of warranty supports these mechanical thumb nuts? A: Warranty information should be confirmed with the seller or manufacturer. Please refer to the product documentation or sales platform for details on any warranty, return policy, or quality assurance provided with these components.. Q: Are these thumb nuts a good value for tool-free fastening needs? A: These thumb nuts offer good value for applications requiring frequent manual adjustment, as their design eliminates the need for tools. The bakelite construction provides durability and an ergonomic grip, making them a practical choice for jigs, clamps, and adjustable hardware..

Thumb Screws & Knobs | M4-M10 Black Bakelite Hand-Tighten Nuts | Star Mechanical Clamping

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