This 1/2″ Galvanised Square U-Bolt is a high-strength fastening solution designed specifically for securing axles, springs, and brackets to 80mm square trailer chassis or frames. The hot-dipped galvanised finish makes it the ideal choice for boat trailers and utility trailers exposed to harsh environments.
Product Overview
Built to handle heavy vibration and high-stress loads, this square-profile U-bolt provides a secure, wrap-around fit for 80mm RHS (Rectangular Hollow Section). The generous 120mm length and 50mm thread allowance offer versatility for various mounting thicknesses, including leaf spring packs and mounting plates.
Key Features
- Corrosion Resistance: Hot-dipped galvanised coating provides superior protection against salt water and rust, extending the life of your trailer hardware.
- Square Profile: Specifically shaped to fit 80mm wide square tubes or axles, ensuring maximum surface contact and preventing shifting.
- Precision Threading: Features 50mm of clean, deep-cut threading to accommodate different plate thicknesses and spring stacks.
- High-Tensile Strength: Manufactured from 1/2″ (approx. 12.7mm) diameter steel, providing the clamping force required for medium-to-heavy duty trailer applications.
Technical Specifications
- Inside Width: 80mm (to suit 80mm Square Tube)
- Inside Length: 120mm
- Thread Length: 50mm
- Wire Diameter: 1/2″
- Material: Hot-Dipped Galvanised Steel
- Shape: Square
Application Note
U-bolts should be checked for tightness after the first 100km of travel and periodically thereafter. For a complete installation, it is recommended to use galvanised Nyloc nuts and flat washers (sold separately) to prevent loosening due to road vibration.
There are no FAQs for this product.
Additional information
| Weight | 0.5 kg |
|---|---|
| Dimensions | 9 × 19 × 1 cm |
Our Service Lifetime Warranty
Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.
Couplemate™ is a manufacturer and vendor of high-quality towing, trailer, and caravan components. Couplemate™ Core Goods and Custom Work are guaranteed to be free of defects for the service lifetime of the product when used as intended.
Warranties are non-transferrable and Couplemate™ requires satisfactory proof of purchase prior to issuing a remedy. The full Couplemate™ Warranty Policy can be found in the Terms & Conditions: Section 8 – Consumer Guarantees & Warranty.
Warranties are in addition to your rights under the Australian Consumer Law. If something is wrong with your order, please contact our team.
60-Day Returns
After 60 years of experience, we know that life has its unpredictable moments.
All Couplemate™ orders (online, over the phone, or in-store) have a 60 day period for change-of-mind returns and exchanges. There are some items that can’t be returned and some returns may incur a 15% restocking fee.
You can view our full policy for change-of-mind returns here.










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