--- product_id: 327668678 title: "300 Pcs Black M3 Hex Socket Head Cap Screws Nuts Washers Assortment Kit" brand: "haochen" price: "$15.54" currency: USD in_stock: true category: "Haochen" url: https://www.desertcart.us/products/327668678-300-pcs-black-m3-hex-socket-head-cap-screws-nuts store_origin: US region: United States of America --- # Organized storage box 300 pcs versatile kit Alloy steel, corrosion resistant 300 Pcs Black M3 Hex Socket Head Cap Screws Nuts Washers Assortment Kit **Brand:** haochen **Price:** $15.54 **Availability:** ✅ In Stock ## Summary > 🔧 Elevate your toolkit with the ultimate hex bolt kit—because every detail counts! ## Quick Answers - **What is this?** 300 Pcs Black M3 Hex Socket Head Cap Screws Nuts Washers Assortment Kit by haochen - **How much does it cost?** $15.54 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/327668678-300-pcs-black-m3-hex-socket-head-cap-screws-nuts) ## Best For - haochen enthusiasts ## Why This Product - Trusted haochen brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Multi-Industry Ready:** Perfect for DIY, automotive, furniture, electronics, and industrial repairs—be the go-to fixer in your circle. - • **Precision M3 Threading:** Smooth, sharp threads ensure effortless installation and a secure, slip-free fit every time. - • **Compact & Organized Storage:** Smartly sorted in a sturdy box for quick access, preventing loss and saving your valuable time. - • **Premium Alloy Steel Strength:** Engineered for durability and rust resistance, built to withstand harsh environments and heavy use. - • **Complete 300-Piece Assortment:** Everything you need in one sleek, black kit to tackle any project without last-minute runs. ## Overview This 300-piece M3 hex socket head cap screw, nut, and washer set features premium alloy steel construction with corrosion-resistant black oxidized finish. Precision threading and a variety of sizes (4mm to 12mm) come neatly organized in a durable storage box, making it ideal for professional-grade repairs and DIY projects across automotive, furniture, electronics, and industrial applications. ## Description Product Information - Product Name: Hex Socket Head Cap Bolts and Nuts and Washers Set - Material: Alloy Steel - Color: Black - Size: M3 - Quantity: 300 Pcs Package Includes: 25 x M3*4 mm 25 x M3*5 mm 25 x M3*6 mm 25 x M3*8 mm 25 x M3*10 mm 25 x M3*12 mm Features: - All hex head nuts and bolts are made of high-quality alloy steel material, which is sturdy, and durable for long time use. - Designed with enough stressed-bearing surface that can be screwed tighter. Easy for your daily use. - All bolts and nuts and washers set is packed in a storage box, which is easy to use, find, and carry. - Hex head bolt set is ideal for metal plates, plastics, wood and other brittle materials. - Suitable for furniture and ship repair, machine made, vehicle, construction site and building, ect. - You will receive a total of 300 pcs M3 hex head bolts and nuts and washers, enough for your daily use. Warm Tips - If you have any questions about using the nut and bolt sets, please feel free to contact us. We will solve your doubts as soon as possible. Note: Manual measurement of metric dimensions has a tolerance of approximately ±0.2 millimetres. ## Features - Premium Material: All hex head bolts and nuts are made of outstanding alloy steel material with high strength, which are corrosion resistance and rust resistance, sturdy, can also be used for a long time in harsh environments. - Easy to Use: Black bolts threads are very smooth, sharp and accurate. It is not easy to deform and slide in the working process. Nuts can increase the surface contact area, reduce wear, and protect screws bolts and other fasteners. - Easy to Store: All hex head screws and nuts are packaged in a sturdy plastic storage box, sorted by size/type for quick access and protection from confusion and loss. - Wide Applications: Hex head bolts and nuts are ideal tools for home and workplace. Mainly used for home and office equipment, communication equipment, ship assembly, machinery industry, furniture, automobile and motorcycle maintenance, DIY, etc. - Package Includes: You will receive a total of 300 pcs hex bolts and nuts and washers, in the size of m3*4 mm, m3*5 mm, m3*6 mm, m3*8 mm, m3*10 mm, m3*12 mm, 25 pcs for each size, enough for your daily use. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08YXL3P7D | | Best Sellers Rank | 21,187 in DIY & Tools ( See Top 100 in DIY & Tools ) 121 in Nut & Bolt Sets | | Brand Name | HAOCHEN | | Colour | M3 black 300 | | Compatible Groove Diameter | 3 Millimeters | | Country Of Origin | China | | Customer Reviews | 4.5 4.5 out of 5 stars (1,502) | | Fastener Type | Bolts | | Finish Types | Oxidised surface | | Grade Rating | Industrial | | Item Diameter | 3 Millimetres | | Item Dimensions | 18 x 10 x 2.3 centimetres | | Item Highlight | Mechanical hexagon fastener set, practical for home, office and electronic equipment assembly | | Item Shape | Cylindrical or Hexagonal | | Item Weight | 160 Grams | | Manufacturer | JUNSHEN | | Material Type | PE (Polyethylene) | | Model Number | Acier allié | | Number Of Items | 1 | | Number of Pieces | 300 | | Screw Head Style | Hex | | Set Name | SetViti Hex Bolts and Washers Screws Assortment Bolts Kit | | Size | M3 | | Thread Size | M3 | | UPC | 692041720889 | | Unit Count | 300.0 count | ## Product Details - **Brand:** HAOCHEN - **Colour:** M3 black 300 - **Item dimensions L x W x H:** 18 x 10 x 2.3 centimetres - **Material:** PE (Polyethylene) - **Size:** M3 ## Images ![300 Pcs Black M3 Hex Socket Head Cap Screws Nuts Washers Assortment Kit - Image 1](https://m.media-amazon.com/images/I/512j+ONdh+L.jpg) ![300 Pcs Black M3 Hex Socket Head Cap Screws Nuts Washers Assortment Kit - Image 2](https://m.media-amazon.com/images/I/4124NpQtU-L.jpg) ![300 Pcs Black M3 Hex Socket Head Cap Screws Nuts Washers Assortment Kit - Image 3](https://m.media-amazon.com/images/I/41WCMxI29KL.jpg) ![300 Pcs Black M3 Hex Socket Head Cap Screws Nuts Washers Assortment Kit - Image 4](https://m.media-amazon.com/images/I/416HVzNVAtL.jpg) ![300 Pcs Black M3 Hex Socket Head Cap Screws Nuts Washers Assortment Kit - Image 5](https://m.media-amazon.com/images/I/41zhdS48RfL.jpg) ## Available Options This product comes in different **Color** options. --- ## 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/327668678-300-pcs-black-m3-hex-socket-head-cap-screws-nuts](https://www.desertcart.us/products/327668678-300-pcs-black-m3-hex-socket-head-cap-screws-nuts) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-09-21*