---
product_id: 594426602
title: "M4 Hex Socket Head Cap Screws Bolts and Nuts and Washers Assortment Kit, 405 Pcs Metric Allen Hex Socket Drive Screws Bolts, 12.9 Grade Alloy Steel, Black Oxide Finish, Fully Threaded"
brand: "youyidun"
price: "€ 20.31"
currency: EUR
in_stock: true
reviews_count: 8
category: "Youyidun"
url: https://www.desertcart.pt/products/594426602-m4-hex-socket-head-cap-screws-bolts-and-nuts-washers
store_origin: PT
region: Portugal
---

# 405 pcs comprehensive kit black oxide corrosion resistance 12.9 grade alloy steel strength M4 Hex Socket Head Cap Screws Bolts and Nuts and Washers Assortment Kit, 405 Pcs Metric Allen Hex Socket Drive Screws Bolts, 12.9 Grade Alloy Steel, Black Oxide Finish, Fully Threaded

**Brand:** youyidun
**Price:** € 20.31
**Availability:** ✅ In Stock

## Summary

> 🔧 Elevate your toolkit with pro-grade precision and style!

## Quick Answers

- **What is this?** M4 Hex Socket Head Cap Screws Bolts and Nuts and Washers Assortment Kit, 405 Pcs Metric Allen Hex Socket Drive Screws Bolts, 12.9 Grade Alloy Steel, Black Oxide Finish, Fully Threaded by youyidun
- **How much does it cost?** € 20.31 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/594426602-m4-hex-socket-head-cap-screws-bolts-and-nuts-washers)

## Best For

- youyidun enthusiasts

## Why This Product

- Trusted youyidun brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **User-Friendly Design:** Socket head cap screws ensure slip-free installation with hex wrench ease
- • **Smart Storage Solution:** Transparent compartmentalized box keeps your fasteners sorted and ready to go
- • **All-in-One Precision Kit:** 405 meticulously organized pieces for every project need
- • **Sleek Black Oxide Finish:** Corrosion and oxidation resistant for longevity in harsh environments
- • **Industrial-Grade Durability:** Crafted from 12.9 grade alloy steel for unmatched strength and wear resistance

## Overview

This M4 Hex Socket Head Cap Screws, Bolts, Nuts, and Washers Assortment Kit includes 405 high-quality pieces made from durable 12.9 grade alloy steel with a black oxide finish. Fully threaded and corrosion-resistant, these fasteners are designed for professional and DIY use across electronics, automotive, furniture, and mechanical applications. The kit comes neatly organized in a transparent storage box for easy access and transport.

## Description

M4 Hex Socket Head Cap Screws Bolts and Nuts and Washers Assortment Kit, 405 Pcs Metric Allen Hex Socket Drive Screws Bolts, 12.9 Grade Alloy Steel, Black Oxide Finish, Fully Threaded: desertcart.com: Industrial & Scientific

Review: Good for 3e printed projects - Building my hardware stock for 3d printed projects.. Great value!
Review: Very nice - If you are in need of metric bolts an nuts you can't go wrong with these little trays with m6 m7m8 1 size per tray but different lengths you can't go wrong with the price an quality

## Features

- Exquisite Material: The hex socket head cap screws bolts and nuts set are made of high-quality 12.9 grade alloy steel, which has good corrosion resistance, high temperature resistance, wear resistance, high hardness, oxidation resistance and durability, not easy to break or deform, and resistant to rust , can maintain good performance in harsh environments
- Socket Head Cap Design: Tight threads are clean, accurate, and smooth, not prone to warping during rolling. The Socket head cap design can be easily installed with a hexagonal wrench, and it is not easy to slip out. The combination of Washers and hex nuts can increase the contact area, reduce pressure, prevent loosening and protect parts
- Easy to Store: All socket head screws and nuts and flat washers set are stored in a transparent and sturdy storage box with compartments. Hex socket cap head screws are stored separately, well organized, easy to carry and find. There is no confusion during transportation and it is convenient to use
- Wide Range of Applications: Suitable for electronic products, furniture installation and maintenance, household appliances, bicycles, automobiles, motorcycles and other vehicle maintenance, mechanical equipment, ship accessories and other fields. Ideal for use by professionals, woodworkers, hobbyists, landlords, repairmen, and others
- Package Includes: 405 pcs in total, including 20 pcs M4x6mm, 20 pcs M4x8mm, 20 pcs M4x10mm, 15 pcs M4x12mm, 15 pcs M4x14mm, 10 pcs M4x16mm, 10 pcs M4x18mm, 10 pcs M4x20mm, 14 pcs M4x25mm , 10 pcs M4x30mm, 130 pcs M4 nuts, 130 pcs M4 washers, 1 x wrenches，rich in size and quantity, to meet your needs in different occasions and fields.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CMC6H2HG |
| Best Sellers Rank | #30,521 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #215 in Socket Head Screws |
| Brand | YOUYIDUN |
| Color | Black |
| Compatible Groove Diameter | 4 millimeters |
| Customer Reviews | 4.5 out of 5 stars 247 Reviews |
| Fastener Type | Socket Head |
| Finish Types | Black Oxide |
| Grade Rating | 12.9 |
| Head Style | Socket |
| Item Diameter | 4 millimeters |
| Item Shape | Hexagonal |
| Manufacturer | CHINA |
| Material | Alloy Steel |
| Material Type | Alloy Steel |
| Number Of Items | 405 |
| Number of Packs | 1 |
| Number of Pieces | 520 |
| Part Number | 1 |
| Screw Head Style | Socket |
| Set Name | M4 Hex Socket Head Cap Screws Bolts and Nuts and Washers Assortment Kit |
| Size | M4-405 |
| Size Name | M4-405 |
| Thread Size | M4 |
| Unit Count | 15.17 Ounce |

## Product Details

- **Brand:** YOUYIDUN
- **Color:** Black
- **Fastener Type:** Socket Head
- **Material:** Alloy Steel
- **Size:** M4-405

## Images

![M4 Hex Socket Head Cap Screws Bolts and Nuts and Washers Assortment Kit, 405 Pcs Metric Allen Hex Socket Drive Screws Bolts, 12.9 Grade Alloy Steel, Black Oxide Finish, Fully Threaded - Image 1](https://m.media-amazon.com/images/I/81V042yqIKL.jpg)
![M4 Hex Socket Head Cap Screws Bolts and Nuts and Washers Assortment Kit, 405 Pcs Metric Allen Hex Socket Drive Screws Bolts, 12.9 Grade Alloy Steel, Black Oxide Finish, Fully Threaded - Image 2](https://m.media-amazon.com/images/I/71G0keZqCnL.jpg)
![M4 Hex Socket Head Cap Screws Bolts and Nuts and Washers Assortment Kit, 405 Pcs Metric Allen Hex Socket Drive Screws Bolts, 12.9 Grade Alloy Steel, Black Oxide Finish, Fully Threaded - Image 3](https://m.media-amazon.com/images/I/7181ZLwpusL.jpg)
![M4 Hex Socket Head Cap Screws Bolts and Nuts and Washers Assortment Kit, 405 Pcs Metric Allen Hex Socket Drive Screws Bolts, 12.9 Grade Alloy Steel, Black Oxide Finish, Fully Threaded - Image 4](https://m.media-amazon.com/images/I/81pZL3OPyTL.jpg)
![M4 Hex Socket Head Cap Screws Bolts and Nuts and Washers Assortment Kit, 405 Pcs Metric Allen Hex Socket Drive Screws Bolts, 12.9 Grade Alloy Steel, Black Oxide Finish, Fully Threaded - Image 5](https://m.media-amazon.com/images/I/71z-IdLaHTL.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good for 3e printed projects
*by B***E on May 20, 2026*

Building my hardware stock for 3d printed projects.. Great value!

### ⭐⭐⭐⭐⭐ Very nice
*by D***. on February 4, 2026*

If you are in need of metric bolts an nuts you can't go wrong with these little trays with m6 m7m8 1 size per tray but different lengths you can't go wrong with the price an quality

### ⭐⭐⭐⭐⭐ Great assortment
*by J***Y on March 16, 2026*

Lots of bolts and nuts

## Frequently Bought Together

- M4 Hex Socket Head Cap Screws Bolts and Nuts and Washers Assortment Kit, 405 Pcs Metric Allen Hex Socket Drive Screws Bolts, 12.9 Grade Alloy Steel, Black Oxide Finish, Fully Threaded
- Kadrick Metric Screw Assortment, 660 Pcs M2 Screws, M2*4mm/6mm/8mm/10mm/12mm/16mm,12.9 Grade Alloy Steel, Metric Hex Socket Head Cap Screws Nuts Washers Kit, Black Zinc Plated Anti Rust Upgrade
- HELIFOUNER 200 Pieces M4 x 30mm /35mm /40mm /45mm /50mm, Hex Socket Head Cap Metric Screws Bolts Washers Nuts Kit, 12.9 Grade Alloy Steel, Fully Threaded, Black

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**Shop now:** [https://www.desertcart.pt/products/594426602-m4-hex-socket-head-cap-screws-bolts-and-nuts-washers](https://www.desertcart.pt/products/594426602-m4-hex-socket-head-cap-screws-bolts-and-nuts-washers)

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-10-04*