---
product_id: 345937628
title: "Multi Purpose Flat Head Wood Screws, 4x30mm (100pcs), Zinc Galvanized Single Thread"
brand: "topywmsp"
price: "S$19"
currency: SGD
in_stock: true
url: https://www.desertcart.sg/products/345937628-multi-purpose-flat-head-wood-screws-4x30mm-100pcs-zinc-galvanized
store_origin: SG
region: Singapore
---

# Heat-treated high tensile strength 4x30mm precision size 72h salt spray corrosion resistance Multi Purpose Flat Head Wood Screws, 4x30mm (100pcs), Zinc Galvanized Single Thread

**Brand:** topywmsp
**Price:** S$19
**Availability:** ✅ In Stock

## Summary

> 🔩 Screw it right, screw it tight — the pro’s choice for lasting builds!

## Quick Answers

- **What is this?** Multi Purpose Flat Head Wood Screws, 4x30mm (100pcs), Zinc Galvanized Single Thread by topywmsp
- **How much does it cost?** S$19 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/345937628-multi-purpose-flat-head-wood-screws-4x30mm-100pcs-zinc-galvanized)

## 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

- • **Power-Ready:** High-strength Philips head designed for seamless use with manual and electric screwdrivers
- • **Built to Last:** Thicker zinc coating guarantees zero rust even after 72 hours in salt spray tests
- • **Heavy-Duty Design:** Heavier and thicker screws provide superior grip and durability compared to standard models
- • **Versatile Performance:** Perfect for wood, plasterboard, chipboard, concrete, plastic, and decking projects
- • **Self-Tapping Efficiency:** Heat-treated alloy steel ensures fast, reliable self-drilling and tapping every time

## Overview

TOPYWMSP Multi Purpose Flat Head Wood Screws (4x30mm, 100pcs) feature a thicker zinc galvanization for superior rust resistance, proven by a 72-hour salt spray test. Made from heat-treated alloy steel, these self-tapping screws deliver high tensile strength and compatibility with both manual and electric drivers. Their versatile flat head design suits a wide range of materials including wood, plasterboard, concrete, and plastic, making them an essential, durable choice for professional and home engineering projects.

## Description

Multi Purpose Flat Head Wood Screws, 4x30mm (100pcs), Zinc Galvanized Single Thread

## Features

- HEAVIER&THICKER：When the quantity and model are the same,Our screws are heavier;zinc coating is thicker
- NEVER RUST:The decking screws are zinc plated and yellow passivated to withstand 72 hours salt spray test, never rust is guaranteed
- HIGH HARDNESS:These self tapping screws are heat treatment improves the tensile strength
- 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 |
|---------------|-------|
| Manufacturer | Zhengzhou HP Ltd |
| Part number | ZZWLSA08078 |
| Item Weight | 185 g |
| Item model number | M4*30 |
| Size | 4x30mm |
| Colour | Yellow |
| Material | alloy_steel，Carbon Steel， Zinc Passivated |
| Number of Pieces | 100 |
| Head Style | Cross Flat Head |
| Cutting Diameter | 4 Millimetres |
| Measurement System | Metric |
| Special Features | self drilling, self tapping |
| Specific uses | home and engineering use |
| Batteries included? | No |
| Batteries Required? | No |
| Item diameter | 4 Millimetres |

## Product Details

- **Material:** alloy_steel，Carbon Steel， Zinc Passivated
- **Drive system:** Phillips
- **Head style:** Cross Flat Head
- **Item dimensions L x W x H:** 30 x 4 x 30 millimetres
- **Exterior finish:** Zinc

## Images

![Multi Purpose Flat Head Wood Screws, 4x30mm (100pcs), Zinc Galvanized Single Thread - Image 1](https://m.media-amazon.com/images/I/51e8mLD6f+S.jpg)

## Available Options

This product comes in different **Size Name** options.

## Questions & Answers

**Q: Which screw is harder, M3.5 or M4?M5?**
A: They're both hard, but the M4 and M5 model is harder.

**Q: How do I determine if I need to pre-drill holes in my wood?**
A: When your wood is very hard, please pre-drill holes in the boards to prevent them from cracking.

**Q: Is this a brass screw?**
A: No,They're made of carbon steel. and yellow zinc plated screws, which are harder than brass screws. But brass screws are more beautiful. Their ability to resist rust is the same.

## Frequently Bought Together

- TOPYWMSP Multi Purpose Flat Head Wood Screws, 4x30mm (100pcs), Zinc Galvanized Single Thread
- ForgeFix Multi-Purpose Single Thread Screws | 4.0 x 40mm | Zinc Yellow Passivated | Box 200
- Heifix Multi-Purpose Wood Screws Pozi Double Countersunk - FREE Screw Bit Included (QTY 200, 5mm x 70mm)

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**Shop now:** [https://www.desertcart.sg/products/345937628-multi-purpose-flat-head-wood-screws-4x30mm-100pcs-zinc-galvanized](https://www.desertcart.sg/products/345937628-multi-purpose-flat-head-wood-screws-4x30mm-100pcs-zinc-galvanized)

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-02-04*