---
product_id: 255842282
title: "Metric Bolt Assortment M2 M3 M4, 21 Sizes 4MM to 30MM Upgraded Zinc Plated Hex Socket Head Cap Machine Screws, 12.9 Alloy Steel Bolts and Nuts Kit Screws Nuts and Washers"
brand: "k kwokker"
price: "$92.79"
currency: USD
in_stock: true
reviews_count: 5
category: "K Kwokker"
url: https://www.desertcart.us/products/255842282-metric-bolt-assortment-m2-m3-m4-21-sizes-4mm-to
store_origin: US
region: United States of America
---

# Upgraded zinc plating for rust-free durability 420 pcs premium bolts & nuts 12.9 grade alloy steel strength Metric Bolt Assortment M2 M3 M4, 21 Sizes 4MM to 30MM Upgraded Zinc Plated Hex Socket Head Cap Machine Screws, 12.9 Alloy Steel Bolts and Nuts Kit Screws Nuts and Washers

**Brand:** k kwokker
**Price:** $92.79
**Availability:** ✅ In Stock

## Summary

> 🔧 Elevate your DIY game with the ultimate bolt arsenal!

## Quick Answers

- **What is this?** Metric Bolt Assortment M2 M3 M4, 21 Sizes 4MM to 30MM Upgraded Zinc Plated Hex Socket Head Cap Machine Screws, 12.9 Alloy Steel Bolts and Nuts Kit Screws Nuts and Washers by k kwokker
- **How much does it cost?** $92.79 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/255842282-metric-bolt-assortment-m2-m3-m4-21-sizes-4mm-to)

## Best For

- k kwokker enthusiasts

## Why This Product

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

## Key Features

- • **Organized & Ready:** Comes in a tidy storage box with individually bagged screws for easy access
- • **Pro-Grade Strength:** 12.9 alloy steel ensures maximum durability and reliability
- • **Rust-Resistant Finish:** Advanced zinc plating extends lifespan without extra maintenance
- • **Ultimate Size Variety:** 21 sizes from 4mm to 30mm cover every project need
- • **Versatile Application:** Perfect for precision machinery, electronics, home appliances, and more

## Overview

This K Kwokker Metric Bolt Assortment features 420 high-quality hex socket head cap screws in 21 sizes (M2, M3, M4) ranging from 4mm to 30mm. Crafted from durable 12.9 grade alloy steel and finished with upgraded zinc plating, these bolts resist rust and wear. Packaged neatly in a storage box with individually bagged screws, this kit is ideal for professionals and enthusiasts tackling precision machinery, electronics, and household projects.

## Description

Buy K Kwokker Metric Bolt Assortment M2 M3 M4, 21 Sizes 4MM to 30MM Upgraded Zinc Plated Hex Socket Head Cap Machine Screws, 12.9 Alloy Steel Bolts and Nuts Kit Screws Nuts and Washers online on desertcart.ae at best prices. ✓ Fast and free shipping ✓ free returns ✓ cash on delivery available on eligible purchase.

Review: It appears the factory that this product comes from does not oil—specifically—the nuts and washers on the black oxide sets. All of the bolts themselves came coated in oil. Even without the oil, none of the nuts, washers, or bolts themselves were rusty on arrival. That "rusty" appearance coating the inside of the nut & washers bag is just loose dirt & oxide powder from the giant bin at the dirty mill/factory that makes its way into the bag along with the fasteners when they fill them. I just dumped the 6 nut and washer bags into disposable cups, sprayed some WD-40 on them, and then wiped the excess away with a paper towel. You'll see after cleaning the dust off that they have no actual rust on them. They're in good condition and work well. Kind of a pain since they're new, but it only took a few minutes. Black oxide is supposed to have oil applied to it, so you should oil the nuts and washers if you choose either of the black oxide sets. I also recommend reserving the black oxide sets for indoor & dry conditions, as they won't hold up well to wet conditions for very long without rusting (even with oil applied). Grab the stainless set if you plan to use them in outdoor or wet conditions. Overall, this is a great set of fasteners.
Review: I bought these to use with a set of metric screw inserts. They match up very well. I also used them in several other projects where I had to use a nut and that also worked well. I like the selection of sizes and the quantity is sufficient. I especially like that washers and nuts are included so that I do not have to purchase them separately.

## Features

- Larger Quantity: Various M2 M3 M4 Screws with Nuts and Flat Washers Meet All Demands: Nice set screw assortment kit. M2 Bolts: 4mm 6mm 8mm 12mm 16mm 20mm 25mm; M3 Bolt: 4mm 8mm 12mm 16mm 18mm 20mm 30mm; M4 Bolt: 6mm 8mm 10mm 14mm 18mm 20mm 30mm
- 21 Sizes More Choices, 4MM to 30MM, Custom 7 Length for 1 Model: Different size of K Kwokker M2 M3 M4 screws and nuts. Others: Long length is just 16mm/20mm/25mm. K Kwokker has a larger quantity of bolts in 420 pcs, while others only have 200+/ 300+ bolts
- More Clean and Tidy, Upgraded Zinc Plated Screw Set, Practical Gifts for Family, Friends: K Kwokker Upgraded Zinc Electroplated and Black Oxidized Version, 2 production process, extended rust prevention time, no need to add anti-rust oil, cleaner, tidier
- More Than 20 Years Experience in Fastener Industry. High Quality 12.9 Grade Alloy Steel: Standardized metric screws assortment, durable nuts and bolts. Screw is packed separately in a bag. Storage: Assorted screws all are stored in one storage bin box
- Wide Usage, K Kwokker Nut And Bolt Assortment Can Be Widely Used: in all kinds of precision machinery, classified instruments, instruments, electronic products, household appliances, communication products, locks, lamps, lights, toys, etc

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07K1DV93T |
| ASIN  | B07K1DV93T |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #39,199 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #157 in Hardware Nuts & Bolts |
| Color | A Black Hex Socket Set |
| Customer Reviews | 4.6 4.6 out of 5 stars (806) |
| Customer reviews | 4.6 4.6 out of 5 stars (806) |
| Cutting Diameter | 4 Millimeters |
| Date First Available | 29 November 2018 |
| Date First Available  | 29 November 2018 |
| Finish | Zinc |
| Finish type | Zinc |
| Head Style | Hex |
| Head style | Hex |
| Is Discontinued By Manufacturer  | No |
| Item Weight | 830 g |
| Item diameter | 4 Millimeters |
| Item model number | TLEEP-24 |
| Item model number  | TLEEP-24 |
| Manufacturer | K Kwokker |
| Manufacturer  | K Kwokker |
| Measurement System | Metric |
| Number of Items | 1260 |
| Number of pieces | 1710 |
| Package Dimensions  | 22.88 x 17.39 x 4.33 cm; 830 g |
| Part number | TLEEP-24 |
| Shape | Hexagonal |
| Special Features | assortment |
| Specific uses | Home |
| Thread size | M2 M3 M4 |
| UPC | 705526213117 |

## Product Details

- **Brand:** K Kwokker
- **Colour:** A Black Hex Socket Set
- **Fastener type:** Socket Head
- **Material:** Alloy Steel
- **Size:** M2 M3 M4

## Images

![Metric Bolt Assortment M2 M3 M4, 21 Sizes 4MM to 30MM Upgraded Zinc Plated Hex Socket Head Cap Machine Screws, 12.9 Alloy Steel Bolts and Nuts Kit Screws Nuts and Washers - Image 1](https://m.media-amazon.com/images/I/81-nit7qlML.jpg)

## Questions & Answers

**Q: Can you sell the various screws separately?  As in, if I wanted to, could I order 30 or 60 m2 x 10, washers, and nuts?**
A: You can, but not in this kit.

**Q: Are these couse thread?**
A: No

**Q: What is the thread pitch of these screws?**
A: Hi friend, thread pitch: M2: 4mm; M3: 5mm; M4: 7mm; M5: 8mm.

**Q: What pitch are the threads? .7mm???**
A: Yes, it's a common one

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by T***M on 28 May 2022*

It appears the factory that this product comes from does not oil—specifically—the nuts and washers on the black oxide sets. All of the bolts themselves came coated in oil. Even without the oil, none of the nuts, washers, or bolts themselves were rusty on arrival. That "rusty" appearance coating the inside of the nut & washers bag is just loose dirt & oxide powder from the giant bin at the dirty mill/factory that makes its way into the bag along with the fasteners when they fill them. I just dumped the 6 nut and washer bags into disposable cups, sprayed some WD-40 on them, and then wiped the excess away with a paper towel. You'll see after cleaning the dust off that they have no actual rust on them. They're in good condition and work well. Kind of a pain since they're new, but it only took a few minutes. Black oxide is supposed to have oil applied to it, so you should oil the nuts and washers if you choose either of the black oxide sets. I also recommend reserving the black oxide sets for indoor & dry conditions, as they won't hold up well to wet conditions for very long without rusting (even with oil applied). Grab the stainless set if you plan to use them in outdoor or wet conditions. Overall, this is a great set of fasteners.

### ⭐⭐⭐⭐⭐ Review
*by M***Y on 6 October 2025*

I bought these to use with a set of metric screw inserts. They match up very well. I also used them in several other projects where I had to use a nut and that also worked well. I like the selection of sizes and the quantity is sufficient. I especially like that washers and nuts are included so that I do not have to purchase them separately.

### ⭐⭐⭐⭐⭐ Review
*by D***E on 22 May 2024*

If you are adding to your hardware selection(collection), then this is a great buy. The screws, nuts, and washers come in a divider, but in individual zip lock baggies. So it'll take a bit of time to get them all opened up and put into the divider. One thing to note is that there are more types of items than there are spaces for them in the divider. I just kept 3 items in their original zip lock bags until I can get the correct storage divider for them. Also, I was missing the M3x25 bolts, but had an additional bag of M3 nuts. I won't remove any stars because of this, because you can see what a simple mistake that would be to make. I'm sure these are hand packed assembly line style. And it's not a big deal.

## Frequently Bought Together

- K Kwokker 1710Pcs Metric Bolt Assortment M2 M3 M4, 21 Sizes 4MM to 30MM Upgraded Zinc Plated Hex Socket Head Cap Machine Screws, 12.9 Alloy Steel Bolts and Nuts Kit Screws Nuts and Washers
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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-09*