--- product_id: 7968410 title: "Helicoil 5521-5 5/16-18 Inch Coarse Thread Repair Kit" brand: "helicoil" price: "€ 63.95" currency: EUR in_stock: true reviews_count: 8 url: https://www.desertcart.hr/products/7968410-helicoil-5521-5-5-16-18-inch-coarse-thread-repair store_origin: HR region: Croatia --- # complete kit with tools & instructions 12 precision inserts 5/16-18 coarse thread fit Helicoil 5521-5 5/16-18 Inch Coarse Thread Repair Kit **Brand:** helicoil **Price:** € 63.95 **Availability:** ✅ In Stock ## Summary > 🔩 Fix it like a pro—thread repair made effortless! ## Quick Answers - **What is this?** Helicoil 5521-5 5/16-18 Inch Coarse Thread Repair Kit by helicoil - **How much does it cost?** € 63.95 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/7968410-helicoil-5521-5-5-16-18-inch-coarse-thread-repair) ## Best For - helicoil enthusiasts ## Why This Product - Trusted helicoil brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Trusted & Proven:** Top-rated with 4.8 stars from 470+ users, a must-have for professionals and DIYers alike. - • **Compact & Portable:** Lightweight 3.2 oz kit fits easily in your toolbox or glove compartment for on-the-go fixes. - • **Universal Fit Mastery:** Designed for 5/16-18 coarse threads, perfect for a wide range of automotive and mechanical repairs. - • **All-in-One Convenience:** Includes Heli-Coil tap, installation tool, and clear instructions—no guesswork, just results. - • **Precision Repair Power:** 12 high-quality inserts ensure durable, reliable thread restoration every time. ## Overview The Helicoil 5521-5 Thread Repair Kit is a compact, all-inclusive solution designed to restore damaged 5/16-18 coarse threads with precision. Featuring 12 durable inserts, a specialized tap, and installation tool, this highly rated kit offers professional-grade repair capability in a portable package trusted by automotive experts and DIY enthusiasts. ## Description Helicoil 5521-5 5/16-18 Inch Coarse Thread Repair Kit ## Features - The product is 5/16-18Thread RepairKit.Fit Type: Universal - Easy and simple use kit - The product is manufactured in China - Includes 12 inserts, complete instructions, Heli-Coil tap and installation tool - Used for repairing tapped holes - Includes 12 inserts, complete instructions, Heli-Coil tap and installation tool - Used for repairing tapped holes - Made from high quality material - Comes in carded packing - Easy to use ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B0002SRDUU | | Best Sellers Rank | #86,724 in Automotive (See Top 100 in Automotive) #15 in Thread Spark Plug Thread Repair Kits | | Brand | Helicoil | | Customer Reviews | 4.8 4.8 out of 5 stars (470) 4.8 out of 5 stars | | Date First Available | October 2, 2001 | | Exterior | Smooth | | Is Discontinued By Manufacturer | No | | Item Model Number | 5521-5 | | Item Weight | 3.2 ounces | | Manufacturer | Heli-Coil | | Manufacturer Part Number | 5521-5 | | Model | Helicoil 5521-5 5/16-18 Inch Coarse Thread Repair Kit | | Oem Part Number | 5521-5 | | Product Dimensions | 4.4 x 0.5 x 3.6 inches | ## Images ![Helicoil 5521-5 5/16-18 Inch Coarse Thread Repair Kit - Image 1](https://m.media-amazon.com/images/I/71PxQ1ZpATL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Throttle position sensor *by on Reviewed in the United States March 1, 2026* Worked great for our project ### ⭐⭐⭐⭐⭐ Helicoil, works as it should, *by on Reviewed in the United States May 10, 2021* This particular size did not work for me as the drill and tap size turned out to be to large of a dia. for the material I was repairing. Not the fault of the helicoil, just a poor material challenge. I was however able to use my smaller helicoil setup to accomplish the repair, I just ordered a size smaller bolt and I am sure I will be fine. Helicoil makes a good product, the bottom part snaps right off cleanly as it should. Just drill, tap, insert and you are back in business. People say you don't need a threadlocker etc. to keep it in the hole, and that may be true, but I use a bit of blue thread lock anyway...belt and suspenders guy ya know........... ### ⭐⭐⭐⭐⭐ Package came in good shape *by on Reviewed in the United States January 11, 2026* The healing coils worked well good product ## Frequently Bought Together - Helicoil 5521-5 5/16-18 Inch Coarse Thread Repair Kit - BOSCH CO2148 1-Piece 21/64 In. x 4-5/8 In. Cobalt Metal Drill Bit for Drilling Applications in Light-Gauge Metal, High-Carbon Steel, Aluminum and Ally Steel, Cast Iron, Stainless Steel, Titanium - Irwin Tools 3016021 Single Cobalt Alloy Steel High-Speed Steel Drill Bit, 21/64" x 4-5/8" --- ## 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.hr/products/7968410-helicoil-5521-5-5-16-18-inch-coarse-thread-repair](https://www.desertcart.hr/products/7968410-helicoil-5521-5-5-16-18-inch-coarse-thread-repair) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-07-13*