--- product_id: 538141661 title: "M8 x 40mm Thread Star Knob 2Pcs, Plastic Star Shaped Clamping Knob Handle Hand Tightening Screw for Umbrella Base Replacement" brand: "lifcratms" price: "50 zł" currency: PLN in_stock: true reviews_count: 8 category: "Lif Cratms" url: https://www.desertcart.pl/products/538141661-m8-x-40mm-thread-star-knob-2pcs-plastic-star-shaped store_origin: PL region: Poland --- # Ergonomic star-shaped grip M8 x 40mm precision thread Galvanized carbon steel durability M8 x 40mm Thread Star Knob 2Pcs, Plastic Star Shaped Clamping Knob Handle Hand Tightening Screw for Umbrella Base Replacement **Brand:** lifcratms **Price:** 50 zł **Availability:** ✅ In Stock ## Summary > ⭐ Tighten with style, grip with confidence! 🔩 ## Quick Answers - **What is this?** M8 x 40mm Thread Star Knob 2Pcs, Plastic Star Shaped Clamping Knob Handle Hand Tightening Screw for Umbrella Base Replacement by lifcratms - **How much does it cost?** 50 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/538141661-m8-x-40mm-thread-star-knob-2pcs-plastic-star-shaped) ## Best For - lifcratms enthusiasts ## Why This Product - Trusted lifcratms brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Last:** Galvanized carbon steel screw resists wear and corrosion for long-term reliability. - • **Risk-Free Purchase:** Backed by responsive customer service with a 31-hour satisfaction guarantee. - • **Precision Fit Guaranteed:** M8 x 40mm threaded size ensures seamless compatibility for DIY and professional projects. - • **Versatile Industrial Use:** Perfect for speaker stands, woodworking, automotive, and umbrella base replacements. - • **Effortless Hand-Tightening:** Ergonomic star design lets you clamp with just your fingers—no tools needed. ## Overview The LifCratms M8 x 40mm Thread Star Knob set features durable galvanized carbon steel construction with a smooth, burr-free finish. Its ergonomic star shape offers easy, tool-free hand tightening, making it ideal for industrial, automotive, woodworking, and umbrella base applications. Designed for precision and longevity, these knobs deliver reliable clamping power with a sleek, professional look. ## Description Buy LifCratms M8 x 40mm Thread Star Knob 2Pcs, Plastic Star Shaped Clamping Knob Handle Hand Tightening Screw for Umbrella Base Replacement: Star Knobs - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: Good product and quick shipping - These LifCratms Star Knobs fit my application perfectly. The were shipped and delivered super fast. Review: Great price, works perfectly. - Works great. Thank goodness for desertcart. These knobs were easy to find and arrived at my door - saved me from searching several stores to find them. ## Features - 【The Size You Will Get】 Thread size: M8 x 40mm / 0.31'' x 1.57''(D x L), M8 Head Dia (Approx): 39mm / 1.53'', please check the thread you need before buying Size, male knob is ideal for DIY projects and home repairs - 【Quick & Easy Installation】 No hardware required, this male threaded knobs adopts special star design, comfortable in hand, ergonomic, easy to turn with just your fingers, will not scratch your hand.Come together to diy and install these star knobs into your threaded holes - 【High-Quality Material】 The screw is smooth and burr-free overall, comfortable to hold, the thread is deep and complete and clear, the force is even and not slippery, the stud is made of carbon steel, the surface of the screw is galvanized process, uniform plating, high hardness, durable - 【Wide Scope of Application】 M8 threaded knob Suitable for speaker stands, automotive, woodworking fixtures, industrial instruments and other machinery and equipment, workbenches or benches, is the best choice for clamping operations, industrial equipment, is your daily life to replace the tightening screw - 【100% Risk-Free Shopping】 If there are any quality problems with our products, please contact us via desertcart email as soon as possible. We will sincerely serve you within 31 hours and give you a satisfactory solution. Please rest assured to order, we wish you a happy shopping experience ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09TVK3BD9 | | Batteries Included? | No | | Batteries Required? | No | | Best Sellers Rank | #8,267 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #2 in Star Knobs | | Brand | LifCratms | | Color | Black | | Customer Reviews | 4.4 4.4 out of 5 stars (345) | | Date First Available | March 4, 2022 | | Exterior Finish | Zinc | | Finish | Smooth | | Hand Orientation | Ambidextrous | | Handle Attachment Mechanism | Threaded | | Handle Material | Alloy Steel, Zinc | | Included Components | Knob, Lock | | Item Weight | 2.08 ounces | | Item model number | SUIBMTSK008 | | Manufacturer | LifCratms | | Material | Carbon Steel, Metal, Plastic | | Metal Type | Zinc Plated | | Number Of Pieces | 2 | | Number of Items | 2 | | Part Number | SUIBMTSK008 | | Product Dimensions | 1.57"L x 0.31"W | | Size | M8 x 40mm | | Special Feature | Durable, Easy to Install | | Special Features | Durable, Easy to Install | | Theme | Star | | Unit Count | 2.0 Count | ## Product Details - **Brand:** LifCratms - **Color:** Black - **Material:** Carbon Steel, Metal, Plastic - **Product Dimensions:** 1.57"L x 0.31"W - **Style:** Star Handle ## Images ![M8 x 40mm Thread Star Knob 2Pcs, Plastic Star Shaped Clamping Knob Handle Hand Tightening Screw for Umbrella Base Replacement - Image 1](https://m.media-amazon.com/images/I/61IUcaI1tfL.jpg) ## Available Options This product comes in different **Color, Size, Style** options. ## Questions & Answers **Q: What is the thread pitch?** A: Hello, Thank you for your question. The thread pitch of "M10 x 30mm Thread Star Knob" is 1.5mm. Best Regards **Q: What is the thread pitch of the M8x40?** A: Hello， Thank you for your question. The thread pitch of the M8x40 is about 1.25mm. Best Regards ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good product and quick shipping *by K***H on January 24, 2026* These LifCratms Star Knobs fit my application perfectly. The were shipped and delivered super fast. ### ⭐⭐⭐⭐⭐ Great price, works perfectly. *by S***Y on January 26, 2026* Works great. Thank goodness for Amazon. These knobs were easy to find and arrived at my door - saved me from searching several stores to find them. ### ⭐⭐⭐⭐⭐ Perfect fit *by C***S on February 6, 2026* Just like the original knobs, they fit great. Just added some light oil to the threads before installing to add good protection against the weather. ## Frequently Bought Together - LifCratms M8 x 40mm Thread Star Knob 2Pcs, Plastic Star Shaped Clamping Knob Handle Hand Tightening Screw for Umbrella Base Replacement - 1-Pack 12.5" Scooter Inner Tube 12 1/2 x 2 1/4 Angled Valve Stem 12.5" x 2.25" Tube Compatible with 12.5X1.75 12.5 X 1.95 12.5 X 2.125 12.5 x 2.25 Most Bike and Scooter Tire Tube - E-outstanding 2Pcs Black Bike Seat Clamp Seat Post Quick Release Saddle Parts for Folding Bicycle Mountain Bike M6x65 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pl/products/538141661-m8-x-40mm-thread-star-knob-2pcs-plastic-star-shaped](https://www.desertcart.pl/products/538141661-m8-x-40mm-thread-star-knob-2pcs-plastic-star-shaped) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-05-06*