--- product_id: 16983392 title: "NGK Spark Plug, NGK Standard, 10 mm Thread, 0.749 in Reach, Gasket Seat, Stock Number 6689, Resistor, Each" brand: "ngk" price: "VT5390" currency: VUV in_stock: true reviews_count: 13 category: "Ngk" url: https://www.desertcart.vu/products/16983392-ngk-spark-plug-ngk-standard-10-mm-thread-0-749 store_origin: VU region: Vanuatu --- # Built-in resistor for stable, interference-free ignition 98% pure copper core for superior heat dissipation 10 mm cold-rolled threads prevent cross-threading NGK Spark Plug, NGK Standard, 10 mm Thread, 0.749 in Reach, Gasket Seat, Stock Number 6689, Resistor, Each **Brand:** ngk **Price:** VT5390 **Availability:** ✅ In Stock ## Summary > ⚡ Ignite your engine’s potential with NGK’s precision spark! ## Quick Answers - **What is this?** NGK Spark Plug, NGK Standard, 10 mm Thread, 0.749 in Reach, Gasket Seat, Stock Number 6689, Resistor, Each by ngk - **How much does it cost?** VT5390 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/16983392-ngk-spark-plug-ngk-standard-10-mm-thread-0-749) ## Best For - ngk enthusiasts ## Why This Product - Trusted ngk brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Durability Meets Innovation:** High-grade alumina silicate ceramic insulator offers superior strength and efficient heat transfer. - • **Maintenance-Free Excellence:** Trivalent plating eliminates the need for anti-seize, saving you time and hassle. - • **Reliable Ignition, Every Time:** Copper core maximizes heat dissipation to prevent overheating and ensure consistent starts. - • **Trusted by Pros, Loved by Engines:** Universal fit with a 4.7-star rating and proven compatibility with Honda and UTV engines. - • **Precision Fit for Peak Performance:** 10 mm cold-rolled threads guarantee damage-free installation and a perfect seal with gasket seat design. ## Overview The NGK Standard Spark Plug (Stock #6689) features a 98% pure copper core for enhanced heat dissipation, a durable alumina silicate ceramic insulator, and cold-rolled 10 mm threads to prevent cross-threading. Designed with a gasket seat and built-in resistor, it ensures reliable ignition and interference-free performance. Trusted by professionals and compatible with a wide range of UTV and small engine applications, this spark plug delivers consistent starts and long-lasting durability. ## Description Spark Plug, NGK Standard, 10 mm Thread, 0.749 in Reach, Gasket Seat, Stock Number 6689, Resistor, Each Review: Fits my Honda BF 9.9 perfectly. - This is a stock replacement for the existing plugs. I have used NGK plugs in several different engines and never had a issue. Review: Honda - Exactly as described Should work perfectly in my Honda 15hp outboard. ## Features - 98% pure copper core increases heat dissipation for more reliable starts and prevents spark plug from overheating - High-grade alumina silicate ceramic insulator for superior strength and heat transfer - Cold-rolled threads to prevent cross-threading and damage to cylinder heads - Trivalent plating eliminates need for anti-seize and corrugated ribs prevent flashover - Quantity: 1 per package ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B001RMAEIS | | Automotive Fit Type | Universal Fit | | Best Sellers Rank | #73,398 in Automotive ( See Top 100 in Automotive ) #13 in Automotive Performance Spark Plugs #1,293 in Automotive Ignition Parts | | Brand Name | NGK | | Compatible with Vehicle Type | UTV | | Core Material | Copper | | Customer Reviews | 4.7 4.7 out of 5 stars (256) | | Gap Size | 0.75 Inches | | Global Trade Identification Number | 00087295166895 | | Included Components | NGK 6689 | | Item Type Name | SPARK_PLUG | | Item Weight | 0.03 Kilograms | | Manufacturer | NGK | | Manufacturer Part Number | CR5EH-9 | | Manufacturer Warranty Description | Manufacturer Warranty | | Model Number | 6689 | | OEM Equivalent Part Number | 6689 | | Thread Size | 10 mm | | Top Material Type | Nickel | | UPC | 087295166895 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** NGK - **Core Material:** Copper - **Thread Size:** 10 mm - **Top Material Type:** Nickel - **Vehicle Service Type:** UTV ## Images ![NGK Spark Plug, NGK Standard, 10 mm Thread, 0.749 in Reach, Gasket Seat, Stock Number 6689, Resistor, Each - Image 1](https://m.media-amazon.com/images/I/71QNg7WcU0L.jpg) ![NGK Spark Plug, NGK Standard, 10 mm Thread, 0.749 in Reach, Gasket Seat, Stock Number 6689, Resistor, Each - Image 2](https://m.media-amazon.com/images/I/61bDKcj4Q5L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Fits my Honda BF 9.9 perfectly. *by D***. on November 10, 2025* This is a stock replacement for the existing plugs. I have used NGK plugs in several different engines and never had a issue. ### ⭐⭐⭐⭐⭐ Honda *by D***N on September 12, 2025* Exactly as described Should work perfectly in my Honda 15hp outboard. ### ⭐⭐⭐⭐⭐ Fits Honda Outboard *by W***N on July 1, 2021* They fit my BF20D/BFP20D Honda 20HP Outboard Motor. It Runs Great. --- ## 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.vu/products/16983392-ngk-spark-plug-ngk-standard-10-mm-thread-0-749](https://www.desertcart.vu/products/16983392-ngk-spark-plug-ngk-standard-10-mm-thread-0-749) --- *Product available on Desertcart Vanuatu* *Store origin: VU* *Last updated: 2026-04-22*