---
product_id: 598346597
title: "SPARKWHIZ Trailer U Bolt Kit 7 inch for 5,200-7,000 lb Trailer Axle, 3\" Round Axle, 1/2” Diameter, 2 Pack"
brand: "sparkwhiz"
price: "44936 som"
currency: KGS
in_stock: true
reviews_count: 5
category: "Sparkwhiz"
url: https://www.desertcart.kg/products/598346597-sparkwhiz-trailer-u-bolt-kit-7-inch-for-5-200
store_origin: KG
region: Kyrgyzstan
---

# Grade 8.8 Alloy Steel Strength 7-inch U-Bolt for 3-inch Axle Rust & Corrosion Resistant Finish SPARKWHIZ Trailer U Bolt Kit 7 inch for 5,200-7,000 lb Trailer Axle, 3" Round Axle, 1/2” Diameter, 2 Pack

**Brand:** sparkwhiz
**Price:** 44936 som
**Availability:** ✅ In Stock

## Summary

> 🛠️ Lock in strength, lock out worries — upgrade your trailer’s backbone today!

## Quick Answers

- **What is this?** SPARKWHIZ Trailer U Bolt Kit 7 inch for 5,200-7,000 lb Trailer Axle, 3" Round Axle, 1/2” Diameter, 2 Pack by sparkwhiz
- **How much does it cost?** 44936 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/598346597-sparkwhiz-trailer-u-bolt-kit-7-inch-for-5-200)

## Best For

- sparkwhiz enthusiasts

## Why This Product

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

## Key Features

- • **Premium Grade Alloy Steel:** Crafted from Grade 8.8 carbon steel for unmatched durability and safety under pressure.
- • **Built to Endure Heavy Loads:** Supports 5,200-7,000 lbs trailer axles with precision-engineered 7-inch U-bolts.
- • **Optimized for 3-Inch Round Axles:** Perfectly sized for a snug fit on standard trailer axles, enhancing braking system performance.
- • **Corrosion-Resistant Black Oxide Finish:** Keeps your trailer hardware looking sharp and performing flawlessly season after season.
- • **Complete 2-Pack with Tie Plates & Hex Nuts:** Everything you need for a secure, hassle-free installation in one package.

## Overview

The SPARKWHIZ Trailer U Bolt Kit features heavy-duty 7-inch U-bolts designed for 3-inch round axles supporting 5,200 to 7,000 lbs. Made from Grade 8.8 alloy steel with a black oxide finish, this 2-pack kit includes hex nuts and tie plates for easy installation and superior corrosion resistance, ensuring reliable trailer performance and enhanced braking system stability.

## Description

trailer axle kit

Review: Order the right size.
Review: Seems to be well made. Good fasteners.

## Features

- For 5,200 - 7,000lbs round axle which axle beam dia 3"
- 8 x 7" long U bolts, U bolts dia. 1/2", 16 x 1/2"-20 hex nuts, 4 x tie plates for 1-3/4" leaf springs
- Durable steel construction. Resistant to rust and corrosion
- Enhances performance of your braking system
- Facilitates easy installation

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BZNGN15M |
| Brand | SPARKWHIZ |
| Compatible Groove Diameter | 3 Inches |
| Customer Reviews | 4.4 out of 5 stars 95 Reviews |
| Exterior Finish | Black Oxide |
| Fastener Type | U-Bolt |
| Grade Rating | Class 8.8 |
| Head Style | Hex |
| Head Type | Hex |
| Item Diameter | 0.5 Inches |
| Item Dimensions | 17.8 x 7.6 x 1.3 Centimeters |
| Item Hardness | Grade 8.8 |
| Manufacturer | SPARKWHIZ |
| Manufacturer Grade | Grade 5 |
| Material | Alloy Steel |
| Material Type | Alloy Steel |
| Metal Type | Carbon Steel |
| Number of Pieces | 2 |
| Screw Head Style | Hex |
| Set Screw Thread Type | Unc |
| Size Name | 7" for axle beam dia 3" |
| Thread Class | 3B |
| Thread Coverage | Unthreaded |
| Thread Type | UN |
| UPC | 726347576175 |

## Product Details

- **Material:** Alloy Steel
- **Exterior Finish:** Black Oxide
- **Manufacturer Grade:** Grade 2
- **Head Style:** Hex, Round, U-Bolt
- **Fastener Type:** U-Bolt

## Images

![SPARKWHIZ Trailer U Bolt Kit 7 inch for 5,200-7,000 lb Trailer Axle, 3" Round Axle, 1/2” Diameter, 2 Pack - Image 1](https://m.media-amazon.com/images/I/71EjkqYi5UL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐ Order the right size.
*by V***R on 3 February 2026*



### ⭐⭐⭐⭐⭐ Seems to be well made. Good fasteners.
*by M***N on 9 February 2025*



### ⭐⭐⭐⭐⭐ Exactly what was needed worked great
*by S***N on 6 December 2024*



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**Shop now:** [https://www.desertcart.kg/products/598346597-sparkwhiz-trailer-u-bolt-kit-7-inch-for-5-200](https://www.desertcart.kg/products/598346597-sparkwhiz-trailer-u-bolt-kit-7-inch-for-5-200)

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*Product available on Desertcart Kyrgyzstan*
*Store origin: KG*
*Last updated: 2026-11-13*