--- product_id: 48415015 title: "Thunderbolt 8, M8 x 75 Genuine Masonry Concrete Anchor Screw with Hexagonal Head (V35156)" brand: "thunderbolt" price: "$35.22" currency: USD in_stock: true reviews_count: 9 category: "Thunderbolt" url: https://www.desertcart.us/products/48415015-thunderbolt-8-m8-x-75-genuine-masonry-concrete-anchor-screw store_origin: US region: United States of America --- # M8 x 75mm precision size Patented concave thread for low torque install Stress-free non-expansion anchor Thunderbolt 8, M8 x 75 Genuine Masonry Concrete Anchor Screw with Hexagonal Head (V35156) **Brand:** thunderbolt **Price:** $35.22 **Availability:** ✅ In Stock ## Summary > 🔧 Lock it down with Thunderbolt — the anchor that means business! ## Quick Answers - **What is this?** Thunderbolt 8, M8 x 75 Genuine Masonry Concrete Anchor Screw with Hexagonal Head (V35156) by thunderbolt - **How much does it cost?** $35.22 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/48415015-thunderbolt-8-m8-x-75-genuine-masonry-concrete-anchor-screw) ## Best For - thunderbolt enthusiasts ## Why This Product - Trusted thunderbolt brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Edge-Friendly Fixing:** Fix close to edges without causing expansion stress—perfect for delicate or tight spots. - • **Adjustable & Removable:** Easily tweak or remove bolts for precise, professional results every time. - • **Effortless Installation:** Drill, dust, and wind in—no plastic plugs needed for a sleek, fast fix. - • **Fully Threaded Strength:** Fixes along the entire thread length, ensuring maximum grip even through hollow sections. - • **Universal Material Compatibility:** Securely anchors into concrete, brick, wood, marble, block, and stone—versatility that matches your project’s ambition. ## Overview The Genuine Thunderbolt M8 x 75 Hexagonal Head Masonry Concrete Anchor Screw offers a patented concave thread design for rapid, low-torque installation with exceptional pull-out resistance. This non-expansion anchor fixes securely in a variety of materials including concrete, brick, wood, and stone, without stressing the substrate. Fully threaded and adjustable, it enables precise, removable fixing close to edges and through hollow sections, making it the modern solution for medium-duty anchoring needs. ## Description Simply drill a hole using the correct masonry drill bit, remove the dust and debris and wind in. No need for plastic plugs. These bolts are classed as non-expansion anchors which means they won't stress the concrete when fixing. Hexagonal Head Genuine Thunderbolt The unique patented concave thread design taps its own thread and provides a rapid, low torque installation with exceptional pull out resistance. It also allows the user to adjust or remove the bolt ensuring a secure and accurate installation. This stress free, non-expansion through fixing is the new solution for medium duty anchoring into concrete, brick, stone, wood and concrete block replacing the need for traditional anchors such as through bolts, shield, sleeve and drop-in anchors Always 'over drill' the hole by 20mm The M8 Bolt requires a hole clearance through the fixture of 10mm Review: Perfect for many projects - Brilliant product Review: Did the Job - I was having difficulty getting a good solid fix to very hard bricks with rawl bolts but these worked great. Hole must be made with the exact drill size indicated. ## Features - Gives a Mechanical interlock between construction material and the fixing, with no expansion stress - Fixes close to the edge and is totally removable - Fixes along the entire thread length to enable fixing through hollow sections - No marking out required, fixes straight through your fixture - Works in concrete, brick, wood, marble, block, stone and more ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01720TNQC | | Best Sellers Rank | 27,834 in DIY & Tools ( See Top 100 in DIY & Tools ) 402 in Screws (DIY & Tools) | | Brand Name | Thunderbolt | | Compatible Groove Diameter | 2E+1 Millimeters | | Customer Reviews | 4.5 4.5 out of 5 stars (761) | | Drive System | External Hex | | Exterior Finish | Plastic | | Fastener Size | M8 x 75 | | Fastener Type | Hexagon Anchor Bolt | | Finish Types | plastic | | Grade Rating | Class 10.9 | | Head Type | Hex | | Item Diameter | 8 Millimetres | | Item Hardness | Grade 10.9 | | Item Weight | 454 g | | Manufacturer | GENUINE THUNDERBOLT® | | Manufacturer Grade | Class 10.9 | | Material Type | Plastic | | Maximum Shear Strength | [10, 70] MPa | | Metal | Stainless Steel | | Number of Pieces | 1 | | Screw Head Style | Hex | | Screw Point Style | hollow | | Set Screw Thread Type | M (Manufacturer | | Size | M8 x 75 | | Thread Class | Class 6 | | Thread Coverage | Fully Threaded | | Thread Size | M8 | | Thread Style | Standard | | Thread Type | UNC | | Unit Count | 8.0 count | ## Product Details - **Exterior finish:** Plastic - **Head style:** Hex - **Manufacturer grade:** Class 10.9 - **Material:** Plastic - **Thread size:** M8 ## Images ![Thunderbolt 8, M8 x 75 Genuine Masonry Concrete Anchor Screw with Hexagonal Head (V35156) - Image 1](https://m.media-amazon.com/images/I/71XPlgU7xLL.jpg) ## Questions & Answers **Q: What size drill bit do I need to fit these bolts please?** A: You need a 8mm masonary drill. These thunderbolts are interference fit. You drill 8mm hole. Hammer them in slightly at the start and use a spanner to screw them in the rest of the way until fully tightened. The raised parts of the thunderbolts cut into the concrete as you screw them in . Hope this helps. **Q: Are these 8mm width** A: Yes, use an 8mm drill and they'll cut their own thread as you tighten them. They're excellent bolts that I used to anchor a large steel framed garage and I can safely say it ain't going anywhere! **Q: could I sandwich a piece of rope with two bricks bolted together?** A: Probably. But you would need to be careful when drilling and tightening. The bolts are stronger that fragile bricks **Q: Could i use these to fix a cast iron bracket for a hanging basket to my house?** A: I believe so but the brackets you fix to the wall would need to have holes of the right size to accommodate the screws, may be a washer if to large. They do provide excellent anchorage in brick work. Hole sizes crucial. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Perfect for many projects *by B***S on 25 June 2025* Brilliant product ### ⭐⭐⭐⭐⭐ Did the Job *by M***S on 25 December 2024* I was having difficulty getting a good solid fix to very hard bricks with rawl bolts but these worked great. Hole must be made with the exact drill size indicated. ### ⭐⭐⭐⭐ Good quality *by M***N on 19 August 2021* Good quality good grip fast delivery ## Frequently Bought Together - 8, M8 x 75 Genuine Thunderbolt Masonry Concrete Anchor Screw with Hexagonal Head (V35156) - M8 Penny Repair Washers (20 PACK) 8.4mm x 25mm A2 Stainless Steel Large Flat Repair Washer Free UK Delivery - Fixman 995311 Bolt Down Post Shoe 75 x 75 mm, Brown --- ## 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.us/products/48415015-thunderbolt-8-m8-x-75-genuine-masonry-concrete-anchor-screw](https://www.desertcart.us/products/48415015-thunderbolt-8-m8-x-75-genuine-masonry-concrete-anchor-screw) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-16*