--- product_id: 348505261 title: "4x20mm Wood Screws, Flat Head Screws for Wood,Fine Thread and Yellow Zinc Galvanized(100pcs)" brand: "topywmsp" price: "¥3247" currency: JPY in_stock: true reviews_count: 10 category: "Topywmsp" url: https://www.desertcart.jp/products/348505261-4x20mm-wood-screws-flat-head-screws-for-wood-fine-thread store_origin: JP region: Japan --- # Heat-treated high tensile strength 4x20mm precision size 72h salt spray corrosion resistance 4x20mm Wood Screws, Flat Head Screws for Wood,Fine Thread and Yellow Zinc Galvanized(100pcs) **Brand:** topywmsp **Price:** ¥3247 **Availability:** ✅ In Stock ## Summary > 🔩 Screw it right, screw it tight — the pro’s choice for flawless fixes! ## Quick Answers - **What is this?** 4x20mm Wood Screws, Flat Head Screws for Wood,Fine Thread and Yellow Zinc Galvanized(100pcs) by topywmsp - **How much does it cost?** ¥3247 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/348505261-4x20mm-wood-screws-flat-head-screws-for-wood-fine-thread) ## Best For - topywmsp enthusiasts ## Why This Product - Trusted topywmsp brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Ready for Action:** Compatible with manual and electric screwdrivers, plus includes a PH2 bit for instant use. - • **Unmatched Durability:** Thicker zinc coating means these screws outlast the rest—rust is not an option. - • **Precision Fit & Finish:** Flat head design with PH2 drive ensures a sleek, flush installation every time. - • **Versatile Power Player:** Perfect for wood, plasterboard, concrete, and more—your all-in-one fastening solution. - • **Engineered for Strength:** Heat-treated alloy steel delivers superior tensile strength and resists head damage. ## Overview These 4x20mm yellow zinc galvanized wood screws combine heavy-duty corrosion resistance with heat-treated high tensile strength. Featuring a flat PH2 head for flush installation and full threading for maximum grip, they’re engineered for versatile use across wood, plasterboard, concrete, and more. With 100 pieces per pack and compatibility with manual and electric drivers, these screws deliver professional-grade reliability and style for every project. ## Description Product Description Flat Head ,Zinc Galvanized,Multi Purpose Screws PH2 Head Colored Zinc Coating S2 Bit (NOT cr-v) Easy to Install Included: Screwdriver Bit The screws match with manual and electric screwdrivers Multi Purpose Screws These wood screws can used for wood、plasterboard、chipboard、concrete、wall、deck、plastic BRAND CONCEPT TOPYWMSP-Provide The Reliable Product ZINC GALVANIZED Galvanized screws, waterproof and rustproof HIGH HARDNESS These self tapping screws are heat treatment improves the tensile strength. TIPS If your wood is very hard, please pre-drill holes in the boards to prevent them from cracking MULTI-PURPOSE These flat head screws can used for wood、plasterboard、chipboard、concrete、wall、deck、plastic. PHILIPS HEAD High Strength philips head Wood Screws Review: Good product all in all - Seems a good screw ,nice gold colour and sets off the black brackets I needed to fasten. Review: Repairs - These are great, screw head included ## Features - HEAVIER&THICKER：When the quantity and model are the same,Our screws are heavier;zinc coating is thicker. - HIGH CORROSION RESISTANCE:The screws are yellow zinc passivated and to withstand 72 hours salt spray test, never rust is guaranteed. - HIGH HARDNESS:These self tapping screws are heat treatment improves the tensile strength.Maximum reduction damaged head. - HIGH STRENGTH:The outdoor screws have high Strength philips head,Perfect match with manual and electric screwdrivers. - VARIOUS PRODUCT USES：High performace for the home and engineering,These flat head screws can used for wood、plasterboard、chipboard、concrete、wall、deck、plastic. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B097BSTVP1 | | Best Sellers Rank | 662 in DIY & Tools ( See Top 100 in DIY & Tools ) 5 in Screws (DIY & Tools) | | Brand Name | TOPYWMSP | | Colour | Yellow | | Compatible Groove Diameter | 4 Millimeters | | Country Of Origin | China | | Customer Reviews | 4.5 out of 5 stars 1,517 Reviews | | Drive System | PH2 | | Exterior Finish | Zinc | | Exterior finish | Zinc | | Fastener Size | 4x20mm | | Fastener Type | Wood Screws | | Finish Types | Zinc Plated | | Head Type | PH2 | | Head style | Cross Flat Head | | Item Diameter | 4 Millimetres | | Item Dimensions | 4 x 4 x 20 millimetres | | Item dimensions L x W x H | 4 x 4 x 20 millimetres | | Manufacturer | Zhengzhou HP Ltd | | Manufacturer Part Number | ZZWLSA08078 | | Material | alloy_steel，Carbon Steel， Zinc Passivated | | Material Type | alloy_steel，Carbon Steel， Zinc Passivated | | Metal | alloy_steel，Carbon Steel， Zinc Passivated | | Number of Pieces | 100 | | Point style | Sharp | | Screw Head Style | Cross Flat Head | | Screw Point Style | Sharp | | Set Screw Thread Type | UNF | | Size | 4x20mm | | Thread Class | Standard | | Thread Coverage | Fully Threaded | | Thread Size | M4 | | Thread Style | Right Hand | | Thread Type | UNF | | Thread size | M4 | | Unit Count | 100 count | ## Product Details - **Material:** alloy_steel，Carbon Steel， Zinc Passivated - **Drive system:** PH2 - **Head style:** Cross Flat Head - **Item dimensions L x W x H:** 4 x 4 x 20 millimetres - **Exterior finish:** Zinc ## Images ![4x20mm Wood Screws, Flat Head Screws for Wood,Fine Thread and Yellow Zinc Galvanized(100pcs) - Image 1](https://m.media-amazon.com/images/I/51e8mLD6f+S.jpg) ![4x20mm Wood Screws, Flat Head Screws for Wood,Fine Thread and Yellow Zinc Galvanized(100pcs) - Image 2](https://m.media-amazon.com/images/I/51emZctS4XL.jpg) ![4x20mm Wood Screws, Flat Head Screws for Wood,Fine Thread and Yellow Zinc Galvanized(100pcs) - Image 3](https://m.media-amazon.com/images/I/61G4pxObVEL.jpg) ![4x20mm Wood Screws, Flat Head Screws for Wood,Fine Thread and Yellow Zinc Galvanized(100pcs) - Image 4](https://m.media-amazon.com/images/I/71xPANjkYEL.jpg) ![4x20mm Wood Screws, Flat Head Screws for Wood,Fine Thread and Yellow Zinc Galvanized(100pcs) - Image 5](https://m.media-amazon.com/images/I/71GM8r-IObL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Can you use these in concrete/cement...?** A: Yes friend, But，If you wall is concrete or brick/cement,You need to prepare some plugs to use,And use the plug combined with the suitable screw. After choosing the suitable screw and plug,dirll a hole that is slightly longer than the plug.Tap in the plug with a hammer and then drive in the screw. Tips：A rule of thumb is that the lenth of the screw should be twice as long as the thickness of the object you intend to install onto the wood wall. **Q: Do you have to pre drill holes first in wood then screw in or screw directly into wood (fences)?** A: You can probably screw directly into the wood, if the wood is relatively soft (pine as opposed to oak), but it's generally easier if you pre-drill a hole first as sometimes the screw head might strip if there is no pilot hole and you have to use a lot of force to turn the screw. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good product all in all *by J***S on 29 May 2026* Seems a good screw ,nice gold colour and sets off the black brackets I needed to fasten. ### ⭐⭐⭐⭐⭐ Repairs *by S***Y on 16 June 2026* These are great, screw head included ### ⭐⭐⭐⭐ Great screws *by R***N on 27 April 2026* Great value ## Frequently Bought Together - 4x20mm Wood Screws, Flat Head Screws for Wood,Fine Thread and Yellow Zinc Galvanized(100pcs) - ForgeFix Multi-Purpose Single Thread Screws | 4.0 x 40mm | Zinc Yellow Passivated | Box 200 - ForgeFix Multi-Purpose Single Thread Screws | 5.0 x 20mm | Zinc Yellow Passivated | Box 200 --- ## 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.jp/products/348505261-4x20mm-wood-screws-flat-head-screws-for-wood-fine-thread](https://www.desertcart.jp/products/348505261-4x20mm-wood-screws-flat-head-screws-for-wood-fine-thread) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-08-06*