--- product_id: 222057510 title: "100pcs M3 x 8mm 12.9 Grade Alloy Steel Hex Socket Head Cap Screws Bolts,Black Oxide Finish" brand: "zw99 store" price: "52.70 DT" currency: TND in_stock: true category: "Zw99" url: https://www.desertcart.tn/products/222057510-100pcs-m3-x-8mm-12-9-grade-alloy-steel-hex store_origin: TN region: Tunisia --- # Full Thread Coverage - Maximum Grip Black Oxide Finish - Corrosion Resistant Grade 12.9 Alloy Steel - Ultra Durable 100pcs M3 x 8mm 12.9 Grade Alloy Steel Hex Socket Head Cap Screws Bolts,Black Oxide Finish **Brand:** zw99 store **Price:** 52.70 DT **Availability:** ✅ In Stock ## Summary > 🔩 Lock in strength and style with every turn! ## Quick Answers - **What is this?** 100pcs M3 x 8mm 12.9 Grade Alloy Steel Hex Socket Head Cap Screws Bolts,Black Oxide Finish by zw99 store - **How much does it cost?** 52.70 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/222057510-100pcs-m3-x-8mm-12-9-grade-alloy-steel-hex) ## Best For - zw99 store enthusiasts ## Why This Product - Trusted zw99 store brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Bulk Pack of 100:** Stay ahead of your projects with a high-volume set designed for continuous use and convenience. - • **Precision Metric Sizing:** M3 x 8mm with 0.5mm thread pitch ensures perfect fit and compatibility across projects. - • **Sleek Black Oxide Finish:** Not just tough—resists corrosion while adding a professional matte black aesthetic. - • **Industrial-Grade Strength:** Crafted from premium 12.9 alloy steel for unmatched durability and shear strength. - • **Fully Threaded for Maximum Hold:** Thread coverage from head to tip guarantees superior fastening power every time. ## Overview This set of 100 M3 x 8mm hex socket head cap screws features grade 12.9 alloy steel construction for exceptional strength and durability. Finished with a sleek black oxide coating, these fully threaded screws offer superior corrosion resistance and maximum grip, making them ideal for professional-grade industrial and scientific applications. ## Description Material: 12.9 Alloy Steel ## Features - Material: 12.9 Alloy Steel - Metric M3 screws,Thread Length: M3 x 8mm，Thread Diameter: 3mm, - Thread Pitch: 0.5mm, Total Length: 11 mm - Head Diameter: 5.3mm，Head Height : 3mm - Thread Coverage: Full Thread ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07CMQ1SQH | | Best Sellers Rank | #6,110 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #34 in Socket Head Screws | | Brand | zw99 Store | | Color | Black | | Compatible Groove Diameter | 3 Millimeters | | Customer Reviews | 4.8 4.8 out of 5 stars (650) | | Drive System | Internal Hex | | Exterior Finish | Black Oxide | | Fastener Size | M3 | | Fastener Type | Hexagon Bolt | | Finish Types | Black Oxide | | Grade Rating | grade_12.9 | | Head Type | Hex | | Item Diameter | 3 Millimeters | | Item Dimensions | 0.21 x 0.21 x 0.31 inches | | Item Hardness | Grade 12.9 | | Manufacturer | GuanGuangshundagshunda | | Manufacturer Grade | Grade 12 9 | | Material Type | Alloy Steel | | Maximum Shear Strength | High | | Metal Type | Alloy Steel | | Model | Metric M3 Hex Socket Head Cap Screws | | Number Of Items | 1 | | Number of Pieces | 100 | | Outside Diameter | 3 Millimeters | | Part Number | 12.9-M3 | | Screw Head Style | Hex | | Set Name | 100pcs | | Set Screw Thread Type | Metric | | Size Name | M3 x 8mm | | Thread Class | 12.9 | | Thread Coverage | Fully Threaded | | Thread Size | M3 | | Thread Style | Right Hand | | Thread Type | [Unc, Unf] | | UPC | 647731947640 | | Unit Count | 1.0 Count | ## Product Details - **Exterior Finish:** Black Oxide - **Head Style:** Hex - **Manufacturer Grade:** Grade 12 9 - **Material:** Alloy Steel - **Thread Size:** M3 ## Images ![100pcs M3 x 8mm 12.9 Grade Alloy Steel Hex Socket Head Cap Screws Bolts,Black Oxide Finish - Image 1](https://m.media-amazon.com/images/I/51nr+xZ7PUL.jpg) ![100pcs M3 x 8mm 12.9 Grade Alloy Steel Hex Socket Head Cap Screws Bolts,Black Oxide Finish - Image 2](https://m.media-amazon.com/images/I/51w3TmVJJ4L.jpg) ![100pcs M3 x 8mm 12.9 Grade Alloy Steel Hex Socket Head Cap Screws Bolts,Black Oxide Finish - Image 3](https://m.media-amazon.com/images/I/61h9ltH0UnL.jpg) ![100pcs M3 x 8mm 12.9 Grade Alloy Steel Hex Socket Head Cap Screws Bolts,Black Oxide Finish - Image 4](https://m.media-amazon.com/images/I/71V6Gr5wvNL.jpg) ## Available Options This product comes in different **Size, Item Package Quantity** options. ## Frequently Bought Together - 100pcs M3 x 8mm 12.9 Grade Alloy Steel Hex Socket Head Cap Screws Bolts,Black Oxide Finish - uxcell a16033100ux0563 M3 Carbon Steel Grade 8 Hexagon Hex Nut Black Carbon Steel (Pack of 100) - BNUOK 120pcs M3 x 6mm Hex Socket Head Cap Screws Bolts, 12.9 Grade Alloy Steel, Black Oxide Finish, Allen Socket Drive, Full Threads,with Hex Spanner --- ## 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.tn/products/222057510-100pcs-m3-x-8mm-12-9-grade-alloy-steel-hex](https://www.desertcart.tn/products/222057510-100pcs-m3-x-8mm-12-9-grade-alloy-steel-hex) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-08-09*