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Item #:
89902656
BokWin Star Hand Tightening Screw M8x20mm Clamping Knob Handle for Umbrella Base Replacement (Black)
Item #:
89902656
GMD 911
Price Details
Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )
*All items will import from US
In stock
Imported from USA store
QTY:
Only 6 items left in stock.
Order now and get it around Friday, July 10
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Made of high quality plastic and carbon steel, these durable clamping screws are perfect for various applications.
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What Stands Out
Easy Installation
Designed for quick and effortless installation, this clamping knob allows users to securely fasten umbrella bases without the need for additional tools, enhancing convenience and efficiency in setup.
Durable Material
Constructed from high-quality materials, the BokWin knob ensures longevity and resistance to wear and tear, delivering reliable performance for outdoor settings and varying weather conditions.
Versatile Compatibility
With an M8x20mm size, this clamping knob is compatible with various umbrella models, making it an ideal replacement part that promotes seamless integration and functionality across different outdoor equipment.
Product Details
- Material: This clamping screw knob is made of high quality plastic, smooth surface without burrs, not easy to rust, corrosion resistance, durable.
- Features: screw head star design, comfortable grip, ergonomic, easy to save energy, not easy to scratch your hand.
- Scope of Application: our hex shaped clamping knob is suitable for speaker stands, automotive, woodworking jigs, industrial instruments and other mechanical equipment.
- Thread Size: M8x20mm/0.31"x0.79"(RxL), head diameter is about 38mm/1.5".
- Package Contains:You will get 2 pcs black Thread Knob Tightening Screw.Please confirm the thread size you need before purchase.
| Item Dimensions | 1.5 x 0.31 x 0.31 inches (3.8 x 0.8 x 0.8 cm) |
| Thread Size | 0.79 inch (2 cm) |
| Thread Coverage | Fully Threaded |
| Fastener Size | M8x20mm |
| Size Name | M8*20(Star) |
| Item Diameter | 0.31 Inches (0.8 cm) |
| Number of Pieces | 2 |
| Brand | BokWin |
| Fastener Type | Screw |
| Set Name | BokWin Star Knob Tightening Screw Set (2 Pack) |
| Number Of Items | 2 |
| Unit Count | 2.0 Count |
| Manufacturer | BokWin |
| Included Components | Knob, Screw |
| Screw Head Style | Star |
| Screw Point Style | Star |
| Head Type | Hex |
| Thread Type | Metric |
| Set Screw Thread Type | Metric |
| Thread Style | Right Hand, M8x20mm |
| Thread Class | 3A |
| Drive System | Star |
| Material Type | Plastic |
| Exterior Finish | Black Oxide |
| Metal Type | Carbon Steel |
| Finish Types | Black oxide |
| Material | Plastic |
| Head Style | Star |
| Item dimensions L x W x H | 1.5 x 0.31 x 0.31 inches (3.8 x 0.8 x 0.8 cm) |
Who Should Buy?
-
Umbrella Owners
Perfect for users needing to replace their stolen or damaged umbrella base knob, ensuring stability and functionality.
-
DIY Enthusiasts
Ideal for individuals who enjoy fixing and maintaining their outdoor furniture, providing easy installation and adjustments.
-
Event Planners
Beneficial for professionals hosting outdoor events, ensuring umbrellas remain securely anchored during windy conditions.
-
Non-Umbrella Users
Not suitable for individuals without umbrellas, as the knob specifically serves umbrella base tightening needs.
-
Heavy-Duty Needs
Users requiring more robust clamping solutions for heavy equipment may find this product inadequate for their needs.
-
Non-Mechanical Users
Individuals uncomfortable with mechanical adjustments might struggle with using this tightening knob effectively.
Product Description
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
What materials are the screws made of?
Answer: The screws are made of high quality plastic and carbon steel. -
Question:
What is the thread size of the clamping screws?
Answer: The thread size is M8x20mm (0.31x0.79 inches). -
Question:
Can these screws be used for automotive applications?
Answer: Yes, these clamping screws are suitable for automotive, woodworking, and various mechanical equipment.
BokWin Star Knobs Editorial Review
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92 customers ratings
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3 Star
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2 Star
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16 June 2026 · via Trustpilot
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12 June 2026 · via Trustpilot
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GMD 911
Order now and get it around Friday, July 10
This item is not restrict in my country.(Please click on above link if this item is not restrict in your country, So our team will review and allow.)
QTY:
Only 6 items left in stock.
Secured transaction
Ubuy works hard to protect your security and privacy. Our advanced payment security system ensures confidentiality by encrypting your information during transmission using AES (Advanced Encryption Standards) and SSL (Secure Socket Layer) protocols. Your payment details are 100% secure as we do not share your payment details with third party sellers.
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Fastest cross-border delivery
Features & Benefits
- High quality plastic and carbon steel construction ensures durability.
- Smooth surface without burrs, resistant to rust and corrosion.
- Ergonomic screw head design for a comfortable grip.
- Suitable for speaker brackets, woodworking jigs, and industrial equipment.
- Includes 2 pieces of 8mmx20mm Thread Knob Tightening Screws.
- Easy to tighten and saves energy while avoiding hand scratches.