--- product_id: 251332244 title: "100pcs M3 x 12mm 12.9 Grade Alloy Steel Hex Socket Head Cap Screws Bolts,Black Oxide Finish" brand: "zw99 store" price: "433108₫" currency: VND in_stock: true reviews_count: 13 category: "Zw99" url: https://www.desertcart.vn/products/251332244-100pcs-m3-x-12mm-12-9-grade-alloy-steel-hex store_origin: VN region: Vietnam --- # M3 x 12mm - precision metric sizing Black Oxide Finish - corrosion resistant Grade 12.9 Alloy Steel - ultra durable 100pcs M3 x 12mm 12.9 Grade Alloy Steel Hex Socket Head Cap Screws Bolts,Black Oxide Finish **Brand:** zw99 store **Price:** 433108₫ **Availability:** ✅ In Stock ## Summary > 🛠️ Screw it right, screw it tight — the pro’s choice for flawless builds! ## Quick Answers - **What is this?** 100pcs M3 x 12mm 12.9 Grade Alloy Steel Hex Socket Head Cap Screws Bolts,Black Oxide Finish by zw99 store - **How much does it cost?** 433108₫ with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/251332244-100pcs-m3-x-12mm-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 - • **Precision Metric Fit:** Exact M3 x 12mm sizing with full thread coverage ensures seamless compatibility with your projects. - • **Bulk Pack Convenience:** 100-piece set keeps your workspace stocked and ready for any build or repair, eliminating downtime. - • **Versatile Application:** Ideal for 3D printing, RC models, and hardware kits—trusted by makers who demand reliability. - • **Sleek Black Oxide Finish:** Corrosion-resistant coating adds longevity and a professional matte black aesthetic. - • **Industrial-Grade Strength:** Crafted from 12.9 grade alloy steel for maximum durability and shear strength up to 580 MPa. ## Overview This 100-piece set of M3 x 12mm hex socket head cap screws features premium 12.9 grade alloy steel construction with a corrosion-resistant black oxide finish. Designed for precision and durability, these fully threaded screws deliver industrial-grade strength and versatility, perfect for professional-grade 3D printing, RC models, and hardware assembly projects. ## Description Material: 12.9 Alloy Steel Review: Great little screws - Bought for 3d printing. Primarily use sunlu PETG and these are great for any assembly needs. Good bang for the Buck and a pretty handy all around size Review: Decent quality and I like that you can buy them in specific sizes as needed. - I use a lot of these length bolts with things from the 3D printer. I like that these are available in bulk in specific sizes so I can stock more of these to match my use. They are decent quality and for the price they are a great choice. I use them to fill a kit and as I am building things. Works well with brass heat set inserts. ## Features - Material: 12.9 Alloy Steel - Metric M3 screws,Thread Length: M3 x 12mm，Thread Diameter: 3mm, - Thread Pitch: 0.5mm, Total Length: 15mm - Head Diameter: 5.3mm，Head Height : 3mm - Thread Coverage: Full Thread ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07CNFTK99 | | Best Sellers Rank | #5,662 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #33 in Socket Head Screws | | Brand | zw99 Store | | Color | Black | | Compatible Groove Diameter | 3 Millimeters | | Customer Reviews | 4.8 out of 5 stars 630 Reviews | | Drive System | Internal Hex | | Exterior Finish | Black Oxide | | Fastener Size | M3 | | Fastener Type | Socket Screws | | Finish Types | Black Oxide | | Grade Rating | grade_12.9 | | Head Style | Hex | | Head Type | Hex | | Item Diameter | 3 Millimeters | | Item Dimensions | 0.21 x 0.21 x 0.31 inches | | Item Hardness | 12.9 grade | | Manufacturer | GuanGuangshundagshunda | | Manufacturer Grade | Grade 12 9 | | Material | Alloy Steel | | Material Type | Alloy Steel | | Maximum Shear Strength | 580 MPa | | Metal Type | Alloy Steel | | Model | Metric M3 Hex Socket Head Cap Screws | | Number Of Items | 1 | | Number of Pieces | 100 | | Part Number | 12.9-M3 | | Screw Head Style | Hex | | Set Name | 100 pieces | | Set Screw Thread Type | Metric | | Size Name | M3 x 12mm | | Thread Class | 3A | | Thread Coverage | Fully Threaded | | Thread Size | M3 | | Thread Style | Right Hand | | Thread Type | Metric | | UPC | 647731947671 | | 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 12mm 12.9 Grade Alloy Steel Hex Socket Head Cap Screws Bolts,Black Oxide Finish - Image 1](https://m.media-amazon.com/images/I/51APivb1AeL.jpg) ![100pcs M3 x 12mm 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 12mm 12.9 Grade Alloy Steel Hex Socket Head Cap Screws Bolts,Black Oxide Finish - Image 3](https://m.media-amazon.com/images/I/71V6Gr5wvNL.jpg) ![100pcs M3 x 12mm 12.9 Grade Alloy Steel Hex Socket Head Cap Screws Bolts,Black Oxide Finish - Image 4](https://m.media-amazon.com/images/I/61h9ltH0UnL.jpg) ## Available Options This product comes in different **Size, Item Package Quantity** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great little screws *by K***H on April 30, 2026* Bought for 3d printing. Primarily use sunlu PETG and these are great for any assembly needs. Good bang for the Buck and a pretty handy all around size ### ⭐⭐⭐⭐⭐ Decent quality and I like that you can buy them in specific sizes as needed. *by M***N on May 10, 2025* I use a lot of these length bolts with things from the 3D printer. I like that these are available in bulk in specific sizes so I can stock more of these to match my use. They are decent quality and for the price they are a great choice. I use them to fill a kit and as I am building things. Works well with brass heat set inserts. ### ⭐⭐⭐⭐⭐ Exactly the ones I needed. *by R***F on January 14, 2026* Used these to assemble a 3D printed project. Worked great. Exactly as described. ## Frequently Bought Together - 100pcs M3 x 12mm 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) - iexcell 50 Pcs M3 x 35mm Thread Pitch 0.5 mm Alloy Steel 12.9 Grade Hex Socket Head Cap Screws Bolts Kit, Black Oxide Finish --- ## 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.vn/products/251332244-100pcs-m3-x-12mm-12-9-grade-alloy-steel-hex](https://www.desertcart.vn/products/251332244-100pcs-m3-x-12mm-12-9-grade-alloy-steel-hex) --- *Product available on Desertcart Vietnam* *Store origin: VN* *Last updated: 2026-05-18*