10pcs Black Plastic Knurled Thumb Screws M3 M4 Hand Tighten Knobs
10pcs Black Plastic Knurled Thumb Screws M3 M4 Hand Tighten Knobs
Details
10-Pack Black Plastic Knurled Thumb Screws – Easy Hand-Tightening Knobs for DIY & Metalworking
Keep your projects firmly in place without reaching for a screwdriver. These black plastic knurled thumb screws feature a textured, round knob head that gives you a confident grip for quick, tool-free adjustments. Whether you're assembling equipment panels, securing enclosures, or fine-tuning DIY builds, these hand-tighten screws make the job faster and more convenient.
Key Features
- Material: Durable carbon steel core with black plastic knurled knob head — corrosion-resistant and built to last
- Sizes Available: M3 / M4 / 11# — versatile sizing to suit a wide range of threading applications
- Head Style: Round knurled knob for easy, tool-free hand tightening
- Screw Type: Machine screws — compatible with standard threaded inserts and nuts
- Pack of 10: Generous quantity ideal for projects requiring multiple adjustment points
- CE Certified: Meets quality and safety standards
- Customizable: Available in custom configurations to match your specific project needs
Specifications
| Brand | JARBLUE |
| Model | LC012 |
| Material | Carbon Steel with Plastic Knob |
| Thread Sizes | M3, M4, 11# |
| Head Style | Round Knurled |
| Quantity | 10 Pieces |
| Certification | CE |
| Country of Origin | Made in Mainland China |
Great For
- DIY metalworking and fabrication projects
- Electronics enclosures and panel assemblies
- 3D printer adjustments and calibration
- Machine guarding and equipment covers
- Woodworking jigs and fixtures
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Frequently Asked Questions
Q: What thread sizes are available for these knurled thumb screws?
A: These black plastic knurled thumb screws are available in M3, M4, and 11# sizes, making them compatible with a wide variety of standard threaded holes and inserts used in metalworking, electronics, and DIY projects.
Q: Do I need any tools to tighten or loosen these screws?
A: No tools are required. The round knurled plastic knob head is specifically designed for comfortable, tool-free hand tightening and loosening — perfect for applications that need frequent adjustments.
Q: Are these thumb screws suitable for outdoor or high-moisture environments?
A: These screws are made from carbon steel with a plastic knob head. While the plastic provides some resistance, we recommend using them primarily in indoor or controlled environments to maintain the integrity of the carbon steel threads over time.
Q: How many pieces come in each pack?
A: Each pack contains 10 pieces of black plastic knurled thumb screws, giving you plenty for multi-point fastening applications or to keep spares on hand for future projects.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.
Materials + Care
We prioritize quality in selecting the materials for our items, choosing premium fabrics and finishings that ensure durability, comfort, and timeless appeal.
Shipping + Returns
We strive to process and ship all orders in a timely manner, working diligently to ensure that your items are on their way to you as soon as possible.