--- product_id: 72755942 title: "2 Pack M8 x 40mm (5/16\" x 1-5/8\") Thread Replacement Star Hand Knob Tightening Screw for Umbrella Base Replacement" brand: "kasteco" price: "₹ 38" currency: INR in_stock: true reviews_count: 8 category: "Kasteco" url: https://www.desertcart.in/products/72755942-2-pack-m8-x-40mm-5-16-x-1-5 store_origin: IN region: India --- # M8 x 40mm precision fit Durable metal + plastic build Fully threaded for secure grip 2 Pack M8 x 40mm (5/16" x 1-5/8") Thread Replacement Star Hand Knob Tightening Screw for Umbrella Base Replacement **Brand:** kasteco **Price:** ₹ 38 **Availability:** ✅ In Stock ## Summary > 🔧 Upgrade your grip game—secure, stylish, and built to last! ## Quick Answers - **What is this?** 2 Pack M8 x 40mm (5/16" x 1-5/8") Thread Replacement Star Hand Knob Tightening Screw for Umbrella Base Replacement by kasteco - **How much does it cost?** ₹ 38 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.in](https://www.desertcart.in/products/72755942-2-pack-m8-x-40mm-5-16-x-1-5) ## Best For - kasteco enthusiasts ## Why This Product - Trusted kasteco brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Dual-Pack Convenience:** Two premium hand knob screws included—ready to replace and reinforce your gear instantly. - • **Precision M8 Threading:** Engineered with an exact 8mm diameter and 1.25mm pitch for flawless compatibility. - • **Enhanced Grip & Control:** Star-shaped hand knob design ensures easy tightening without tools, empowering quick adjustments on the go. - • **Versatile Industrial Use:** Perfect for umbrella bases, mechanical equipment, and instruments—upgrade your setup effortlessly. - • **Robust Metal & Plastic Fusion:** Combines corrosion-resistant alloy steel with ergonomic plastic for lasting durability and comfort. ## Overview This 2-pack of M8 x 40mm star hand knob tightening screws offers a precision-engineered, fully threaded design made from durable alloy steel and plastic. Ideal for umbrella bases and various mechanical applications, these screws provide superior grip and corrosion resistance, ensuring reliable replacements that outperform standard plastic knobs. ## Description Specifications: Material:Metal + Plastic Color:Silver Tone, Black Package includes: 2 x hand knob tightening screw Review: Fixed my canopy - This fixed my canopy swing. These are much better quality than the ones the swing came with which were plastic. The size was a fit and priced well! These screws will hold up more than the plastic. Review: Better than the originals - Perfect replacement for the ones in my umbrella stand that had rusted and the caps had broken off of. These seem to be great quality and they work perfectly ## Features - Screw size: M8-1.25 x 40mm (5/16"-24 x 1-5/8")，The thread diameter is 8mm, the pitch is 1.25mm, and the length is 40mm. - Note: Please check the size before purchasing. - Package included: 2 x hand knob tightening screw,M8 x 40mm (5/16" x 1-5/8") - Material: Metal + Plastic - Widely used for mechanical equipment, instruments, apparatus, food and Umbrella Base Replacement ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07DLRRB3Z | | Best Sellers Rank | #12,902 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #3 in Star Knobs | | Brand | Kasteco | | Color | Silver | | Compatible Groove Diameter | 8 millimeters | | Customer Reviews | 4.3 out of 5 stars 986 Reviews | | Drive System | Torx | | Exterior Finish | Black Oxide | | Fastener Size | M8 | | Fastener Type | Machine Screw | | Finish Types | Powder Coated | | Head Style | Flat | | Head Type | Hex | | Included Components | Knob, Lock | | Item Diameter | 8 millimeters | | Item Dimensions | 1.52 x 0.87 x 0.04 inches | | Item Weight | 0.27 g | | Item dimensions L x W x H | 1.52 x 0.87 x 0.04 inches | | Manufacturer | KTZZ | | Material | Metal, Plastic | | Material Type | Metal, Plastic | | Metal Type | Alloy Steel | | Model | 2fdaa9b5-2fd1-4c92-a813-b552839cc870 | | Number Of Items | 2 | | Number of Pieces | 2 | | Outside Diameter | 8 millimeters | | Point Style | Round Point | | Screw Head Style | Flat | | Screw Point Style | Round Point | | Set Name | 2 Pack | | Set Screw Thread Type | Metric | | Size Name | M8 x 40mm | | Thread Coverage | Fully Threaded | | Thread Size | M8 | | Thread Style | M8 | | Thread Type | Metric | | UPC | 675663909047 | | Unit Count | 2 Count | ## Product Details - **Exterior Finish:** Black Oxide - **Head Style:** Flat - **Item dimensions L x W x H:** 1.52 x 0.87 x 0.04 inches - **Material:** Metal, Plastic - **Thread Size:** M8 ## Images ![2 Pack M8 x 40mm (5/16" x 1-5/8") Thread Replacement Star Hand Knob Tightening Screw for Umbrella Base Replacement - Image 1](https://m.media-amazon.com/images/I/61A34RBuHwL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Does this fit the willow springs swing canopy? 20 or 40mm.** A: Not sure the thread pitch of your project, M8 equals the bolt diameter, 20mm/40mm is the length of the bolt, 20mm = about 3/4", 40mm = about 1.5". You still need to know what the " pitch of the thread" is. Metric threads are made in different "pitchs" Ex: 1.00, 1.25 pitch. Doesn't say the pitch of the bolt in the Amazon Offer. Best to take your bolt to a hardware store and try different metric nuts on it to find what the "Pitch" is, then look on Amazon to find a match. **Q: M8x1.0 or M8x1.25?** A: M8 x 1.25 **Q: Will this fit the DB method exercise machine?** A: As long as the nut is a M8 x 40 mm **Q: Do you offer an M6 x 40 in 304 stainless?** A: no, thank you ## Customer Reviews ### ⭐⭐⭐⭐⭐ Fixed my canopy *by A***Y on November 5, 2025* This fixed my canopy swing. These are much better quality than the ones the swing came with which were plastic. The size was a fit and priced well! These screws will hold up more than the plastic. ### ⭐⭐⭐⭐⭐ Better than the originals *by B***4 on August 14, 2025* Perfect replacement for the ones in my umbrella stand that had rusted and the caps had broken off of. These seem to be great quality and they work perfectly ### ⭐⭐⭐⭐⭐ Good *by A***R on June 14, 2026* Good ## Frequently Bought Together - Kasteco 2 Pack Black 8mm(M8) x 40mm Thread Replacement Star Hand Knob Tightening Screw - BSWAN 4 Pack M8 x 25mmThread Replacement Star Hand Knob Tightening Screw for Umbrella Base Replacement (4 Pack) - LifCratms 6 Pieces M6 x 40mm Thread Star Knobs, Plastic Hex Shaped Clamping Knob Handle Hand Tightening Screw Knob for Umbrella Base Replacement --- ## 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.in/products/72755942-2-pack-m8-x-40mm-5-16-x-1-5](https://www.desertcart.in/products/72755942-2-pack-m8-x-40mm-5-16-x-1-5) --- *Product available on Desertcart India* *Store origin: IN* *Last updated: 2026-09-03*