---
product_id: 55297217
title: "TMW (4) Hot Dipped Galv Square 1/2\" Dia. U-Bolts x 3-1/16\" Inside Width x 4-5/16\" Inside Height & HD Washers, Lock Washers & Nuts for Boat & Utility Trailers Fits Down Over 3\" Wide Metal"
brand: "tmw"
price: "A$35"
currency: AUD
in_stock: false
reviews_count: 9
url: https://www.desertcart.com.au/products/55297217-tmw-4-hot-dipped-galv-square-1-2-dia-u
store_origin: AU
region: Australia
---

# 3-1/16" inside width fits 3"+ axles Hot dipped galvanized for max corrosion resistance 1/2" diameter heavy-duty steel TMW (4) Hot Dipped Galv Square 1/2" Dia. U-Bolts x 3-1/16" Inside Width x 4-5/16" Inside Height & HD Washers, Lock Washers & Nuts for Boat & Utility Trailers Fits Down Over 3" Wide Metal

**Brand:** tmw
**Price:** A$35
**Availability:** ❌ Out of Stock

## Summary

> ⚓ Secure your ride with steel-clad confidence!

## Quick Answers

- **What is this?** TMW (4) Hot Dipped Galv Square 1/2" Dia. U-Bolts x 3-1/16" Inside Width x 4-5/16" Inside Height & HD Washers, Lock Washers & Nuts for Boat & Utility Trailers Fits Down Over 3" Wide Metal by tmw
- **How much does it cost?** A$35 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/55297217-tmw-4-hot-dipped-galv-square-1-2-dia-u)

## Best For

- tmw enthusiasts

## Why This Product

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

## Key Features

- • **Complete Mounting Kit:** Includes HD washers, lock washers, and heavy-duty nuts for secure installation
- • **Precision Fit Guarantee:** 3-1/16" inside width designed to snugly fit over 3" wide axles and cross members
- • **Pro-Level Compatibility:** Threaded nuts sized specifically for galvanized bolts—no stainless steel substitutes
- • **Industrial-Grade Strength:** Crafted from premium U.S. steel for unmatched durability
- • **Ultimate Corrosion Defense:** Hot dipped galvanized finish withstands harsh marine environments

## Overview

This set of four 1/2" diameter hot dipped galvanized square U-bolts, complete with heavy-duty washers and lock nuts, is engineered in the USA to fit over 3" wide axles or cross members. Designed for boat and utility trailers, the corrosion-resistant finish and precision threading ensure a secure, long-lasting hold in demanding environments.

## Description

Full description not available

## Features

- Our U-bolts are manufactured from high quality Steel in the U.S.A. No Plates or Brackets are supplied in this Package. FUA-RG
- This package includes (4) HDG (Hot Dipped Galvanized) Square U-bolts, (8) HDG Flat Washers, (8) HDG Lock Washers, and (8) HDG Heavy Duty Nuts (use a 7/8" wrench/ socket).
- The 3-1/16" width is the clear Inside measurement between the "Legs" of the U-Bolt and they will fit down over 3" x 3" axles or 3" wide cross members.
- The 4- 5/16" Height is the inside dimension measurement from under the top of the "U", to the bottom tip of the threaded"Leg".
- ATTENTION: To determine the Height of the U-bolts that You need, measure the total height of the metal and members to be "clamped" and add 1" for the nut and washers, That will be the Inside Height that YOU NEED.
- Thread Length = 2-1/2" NOTE: Galvanized nuts are threaded larger to accommodate for the added Galvanizing layer on the u-bolt, so stainless steel nuts will NOT work.
- Note: Hot Dipped Galvanized means that the U-Bolts and hardware, are dipped into a tank of 830 Degree F molten zinc.

## Product Details

- **Material:** Low Carbon Steel
- **Thread Size:** 1/2"-13
- **Exterior Finish:** Hot Dipped Galvanized
- **Manufacturer Grade:** Grade 4
- **Head Style:** Flat, U-Bolt

## Images

![TMW (4) Hot Dipped Galv Square 1/2" Dia. U-Bolts x 3-1/16" Inside Width x 4-5/16" Inside Height & HD Washers, Lock Washers & Nuts for Boat & Utility Trailers Fits Down Over 3" Wide Metal - Image 1](https://m.media-amazon.com/images/I/7186BCrHCEL.jpg)
![TMW (4) Hot Dipped Galv Square 1/2" Dia. U-Bolts x 3-1/16" Inside Width x 4-5/16" Inside Height & HD Washers, Lock Washers & Nuts for Boat & Utility Trailers Fits Down Over 3" Wide Metal - Image 2](https://m.media-amazon.com/images/I/81CXhQz6p3L.jpg)
![TMW (4) Hot Dipped Galv Square 1/2" Dia. U-Bolts x 3-1/16" Inside Width x 4-5/16" Inside Height & HD Washers, Lock Washers & Nuts for Boat & Utility Trailers Fits Down Over 3" Wide Metal - Image 3](https://m.media-amazon.com/images/I/71FxjT55BcL.jpg)
![TMW (4) Hot Dipped Galv Square 1/2" Dia. U-Bolts x 3-1/16" Inside Width x 4-5/16" Inside Height & HD Washers, Lock Washers & Nuts for Boat & Utility Trailers Fits Down Over 3" Wide Metal - Image 4](https://m.media-amazon.com/images/I/81qrRplFcFL.jpg)
![TMW (4) Hot Dipped Galv Square 1/2" Dia. U-Bolts x 3-1/16" Inside Width x 4-5/16" Inside Height & HD Washers, Lock Washers & Nuts for Boat & Utility Trailers Fits Down Over 3" Wide Metal - Image 5](https://m.media-amazon.com/images/I/71P-dMAU8eL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Great quality
  

*by E***H on Reviewed in the United States on March 12, 2024*

These are really strong.  You can tell they will last

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Price
  

*by N***R on Reviewed in the United States on July 15, 2024*

Everything is good Price and quality I used it for a boat trailer

### ⭐⭐⭐⭐ 4.0 out of 5 stars







  
  
    heavy duty
  

*by H***P on Reviewed in the United States on June 23, 2024*

These were exactly what I was looking for.

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**Shop now:** [https://www.desertcart.com.au/products/55297217-tmw-4-hot-dipped-galv-square-1-2-dia-u](https://www.desertcart.com.au/products/55297217-tmw-4-hot-dipped-galv-square-1-2-dia-u)

---

*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-02-27*