---
product_id: 488982919
title: "Dunzy 4 Pcs Square U Bolts Zinc Plated, Heavy Duty Carbon Steel U Bolt Industrial and Scientific Supplies for Boat Trailer Tube, Rectangular Wood and Metal Objects (3/8'' X 3'' X 7'')"
brand: "dunzy"
price: "8938 som"
currency: KGS
in_stock: true
reviews_count: 8
url: https://www.desertcart.kg/products/488982919-dunzy-4-pcs-square-u-bolts-zinc-plated-heavy-duty
store_origin: KG
region: Kyrgyzstan
---

# 3'' width fits 3x3'' square tubes 3/8'' diameter heavy-duty carbon steel Zinc plating for superior rust resistance Dunzy 4 Pcs Square U Bolts Zinc Plated, Heavy Duty Carbon Steel U Bolt Industrial and Scientific Supplies for Boat Trailer Tube, Rectangular Wood and Metal Objects (3/8'' X 3'' X 7'')

**Brand:** dunzy
**Price:** 8938 som
**Availability:** ✅ In Stock

## Summary

> 🔧 Secure your build with strength and style—don’t let your project settle for less!

## Quick Answers

- **What is this?** Dunzy 4 Pcs Square U Bolts Zinc Plated, Heavy Duty Carbon Steel U Bolt Industrial and Scientific Supplies for Boat Trailer Tube, Rectangular Wood and Metal Objects (3/8'' X 3'' X 7'') by dunzy
- **How much does it cost?** 8938 som with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kg](https://www.desertcart.kg/products/488982919-dunzy-4-pcs-square-u-bolts-zinc-plated-heavy-duty)

## Best For

- dunzy enthusiasts

## Why This Product

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

## Key Features

- • **Complete Installation Kit:** Includes 4 U bolts, 4 frame plates, and 8 nuts—everything you need for a hassle-free setup.
- • **Durable Carbon Steel Build:** Crafted from heavy-duty carbon steel to withstand demanding industrial and outdoor conditions.
- • **Versatile Industrial & DIY Use:** Perfect for boat trailers, metal frames, wood fastening, and automotive applications—boost your project’s reliability.
- • **Corrosion-Resistant Zinc Plating:** Zinc coating ensures long-lasting protection against rust, ideal for marine and wet environments.
- • **Precision Fit for 3x3'' Structures:** Engineered to perfectly secure square tubes and frames with exact 3'' width and 7'' length.

## Overview

The Dunzy 4 Pcs Square U Bolts set features heavy-duty 3/8'' diameter carbon steel bolts with zinc plating for enhanced rust resistance. Sized at 3'' width and 7'' length, these bolts are designed to securely fasten 3x3'' square tubes and frames. The package includes 4 bolts, frame plates, and nuts, making it ideal for industrial, automotive, and marine applications where durability and corrosion resistance are critical.

## Description

Full description not available

## Features

- Common Size: the square U bolts measures about 3/8 inch in diameter, 3 inch in width and 7 inch in length, proper for 3 x 3 inch square, suitable size can meet your different fastening needs, please check the size before ordering
- Sufficient Quantity: you will receive 4 pack of square U bolts in zinc, including 4 pieces of u bolts, 4 pieces of frame plates and 8 pieces of nuts; Enough quantity satisfy your uses and replacements
- Hard Material: the square U bolt adopts carbon steel material, and with zinc plated, sturdy and reliable, with nice rust and corrosion resistance, each bolt can withstand the weight, still perform well in rainy and wet environments
- Wide Applications: the U bolts are widely suitable for various fields, such as industry, manufacturing, maintenance, the automotive sector, clothing production, etc., ideal for fastening tubes, woods, trailer, and so on
- Tips: It is recommended to use lubricant during installing the U bolts to prevent wear and tear; Use a manual wrench or socket ratchet when installing nuts; Do not use high speed power tools or impact tools to tighten the nuts

## Product Details

- **Material:** Carbon Steel, Zinc
- **Exterior Finish:** Zinc
- **Manufacturer Grade:** Grade 2
- **Head Style:** Square, U-Bolt
- **Color:** carbon steel plated

## Images

![Dunzy 4 Pcs Square U Bolts Zinc Plated, Heavy Duty Carbon Steel U Bolt Industrial and Scientific Supplies for Boat Trailer Tube, Rectangular Wood and Metal Objects (3/8'' X 3'' X 7'') - Image 1](https://m.media-amazon.com/images/I/71Zqs4Ak8bL.jpg)
![Dunzy 4 Pcs Square U Bolts Zinc Plated, Heavy Duty Carbon Steel U Bolt Industrial and Scientific Supplies for Boat Trailer Tube, Rectangular Wood and Metal Objects (3/8'' X 3'' X 7'') - Image 2](https://m.media-amazon.com/images/I/71hTdS8+XxL.jpg)
![Dunzy 4 Pcs Square U Bolts Zinc Plated, Heavy Duty Carbon Steel U Bolt Industrial and Scientific Supplies for Boat Trailer Tube, Rectangular Wood and Metal Objects (3/8'' X 3'' X 7'') - Image 3](https://m.media-amazon.com/images/I/7145xAKQPWL.jpg)
![Dunzy 4 Pcs Square U Bolts Zinc Plated, Heavy Duty Carbon Steel U Bolt Industrial and Scientific Supplies for Boat Trailer Tube, Rectangular Wood and Metal Objects (3/8'' X 3'' X 7'') - Image 4](https://m.media-amazon.com/images/I/71c7NxOxDNL.jpg)
![Dunzy 4 Pcs Square U Bolts Zinc Plated, Heavy Duty Carbon Steel U Bolt Industrial and Scientific Supplies for Boat Trailer Tube, Rectangular Wood and Metal Objects (3/8'' X 3'' X 7'') - Image 5](https://m.media-amazon.com/images/I/7142kVhIkQL.jpg)

## Available Options

This product comes in different **Color, Size, Number of Items** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fasteners will keep it together.
*by J***M on June 30, 2025*

Not a lot can go wrong with these. Only time will tell how yhey weather. So far they seem as good of quality as any others I have gotten, while maintaining a low price.

### ⭐⭐⭐⭐⭐ Shipped very quickly.
*by W***E on July 18, 2025*

Good product as expected

### ⭐⭐⭐⭐⭐ a little big for a 4x4 post but still works great
*by T***S on July 28, 2025*

good product

## Frequently Bought Together

- Dunzy 4 Pcs Square U Bolts Zinc Plated, Heavy Duty Carbon Steel U Bolt Industrial and Scientific Supplies for Boat Trailer Tube, Rectangular Wood and Metal Objects (3/8'' X 3'' X 7'')
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**Shop now:** [https://www.desertcart.kg/products/488982919-dunzy-4-pcs-square-u-bolts-zinc-plated-heavy-duty](https://www.desertcart.kg/products/488982919-dunzy-4-pcs-square-u-bolts-zinc-plated-heavy-duty)

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*Product available on Desertcart Kyrgyzstan*
*Store origin: KG*
*Last updated: 2026-01-27*