Bolt-On Adjustable Round Post Hinge Set
Fast Install. No Welding. No Sagging.
The strongest adjustable bolt-on hinge set on the market. Built for round steel posts, installed with one tool, and designed so your gate never drags in the dirt again. Patent-protected Australian design.
An Adjustable Hinge For Round Steel Posts, No Welding
Bolts straight onto a range of round post sizes and adjusts until the gate hangs true. Stronger than a welded hinge, with no sharp edges to bruise livestock. Patent protected.
*Retail pricing shown is a guide only. Prices will vary depending on store location and quantities. Freight costs are not included in this price guide. All pricing includes 10% GST.
Fast & Easy Installation
No Welding. One Tool
The FG6 can be installed in minutes with no welding, no drilling, and no power tools. All you need is a 19mm socket or spanner. That makes it the only hinge set you can fit during total fire bans, in remote locations, or anywhere a welder isn’t practical.
HOW DOES THE ADJUSTMENT WORK?
140mm of Vertical Adjustment
The bottom gudgeon pin allows you to adjust the gate angle easily, whenever it’s required. No more gates dragging on the ground, or sticking up in the air. With 140mm (5½”) of vertical adjustment and three lockable positions, you can get the swing right first time — and correct it later if the ground shifts, posts move, or conditions change.
Interactive demonstration only — not to scale. The gate rests on the bottom pin; adjusting the pin position changes the gate angle and far-end ground clearance. Three lockable positions provide 140mm of total adjustment.
ENGINEERED TO LAST DECADES
Built Stronger Than Welded.
The FG6 isn't just easier to install than welding — it's engineered to match or exceed the strength of a welded hinge. The combination of 6mm hot rolled steel straps, the CubeLok gudgeon pin assembly, and a 75mm nylon-bushed pin means this hinge set doesn't flex, doesn't grind, and doesn't fail.
Protects both the pin and the inside of the gate. Ensures the galvanised surface never wears away. No rust, no friction, no grinding — just smooth, effortless swinging for decades.
At least 20% stronger than the 5mm material used by competitors. Smooth, burr-free edges for maximum strength and safe livestock handling.
Complete galvanised coating for rust resistance in all Australian conditions.
The CubeLok assembly supports the gate in any position through a full 180-degree swing without twisting
Trusted by government departments, mines, and farmers across every state. Built to handle the heat, the dust, and the stock.
PATENT-PROTECTED INNOVATION
Patent-Protected Lockable Washer
Our patent-protected CubeLok washer is the real secret behind the FG6's strength. Unlike other hinges that rely on friction to hold position, the CubeLok locks the gudgeon pin into place: bolted, not just clamped. The result is an adjustable hinge that performs like a welded one.
FEEDBACK ON THE FG6
Trusted Across Australia
THE FULL DETAILS
About The FG6
This patent-protected heavy duty hinge set (also known as the FG6) is specially made for swinging rural gates on round steel pipe.
Rotech built this hinge set to make it easy for farmers to fit gates to pipe and keep their gates hanging level, and out of the dirt. It sounds simple, doesn't it? Yet there are thousands of gates across Australia still dragging in the dirt or sticking way up in the air. Why? Because they're not adjustable.
Adjustability That Lasts
The FG6 allows you to adjust your gate's angle over time, so you will always have a smooth-swinging and stable gate. The hinge will support the gate in any position throughout a full 180-degree swing without twisting, thanks to its unique CubeLok gudgeon pin assembly. With 140mm of vertical adjustment and three lockable positions, there's no more guesswork — and no more sagging.
To add even more rigidity when supporting extra-long or heavy gates, the hinge straps contain predrilled holes that can be used to fix the straps to the posts with screws.
The Nylon Bush Advantage
The gudgeon pin on the Rotech FG6 is a full 75mm long and fitted with a heavy-duty nylon bush. This ensures the base of the gate is held securely and swings effortlessly.
The nylon bush protects both the pin and the inside of the gate, ensuring the galvanised surface is never worn away. The steel pins used by most other manufacturers of this type of hinge tend to rust as the galvanised coating gets worn off by metal-on-metal contact.
Once the galvanised coating is compromised, rust forms on the affected surfaces of both the gate and pin. This creates friction, grinding away the metal and making your gate hard to open — placing far more pressure on the hinge. Rusty gudgeon pins will eventually irreparably damage the gate or break off entirely. The FG6's nylon bush stops that from happening.
Stronger by Design
The 6mm hot rolled steel used in the Rotech hinge straps ensures smooth, burr-free edges and maximum strength — at least 20% stronger than the 5mm material used by some other manufacturers.
The real secret to the strength of the FG6 is the patented CubeLok gudgeon pin mounting assembly. This unique innovation allows the gudgeon pin to be adjusted away from the post but supports it in such a way that it is bolted in place both horizontally and vertically, making it the strongest adjustable pin on the market.
For additional strength, a long nut is included on the bottom of the hinge assembly, giving the FG6 twice the holding power of an adjustable hinge with a standard nut. This means the nut won't slip over time — a common problem with other gate hinges.
No Welding, No Fire Risk
The FG6 requires no welding or grinding. That means it's perfect for summer installations — zero fire risk. It's no wonder government departments and mines rely on this gate kit.
Don't risk a cheaper alternative. Don't get talked into fitting non-adjustable bolt-ons. There is nothing truly like the Rotech FG6.
Bolt-On Adjustable Round Post Hinge Set
Common Questions About the FG6
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Yes, that’s one of the biggest advantages. The FG6 requires zero welding, grinding, or sparks. A 19mm spanner is the only tool you need, making it completely safe to install during total fire ban periods.
The FG6 is an Australian patent-protected design, galvanised for rust resistance, and trusted by thousands of farmers across every state. The 6mm hot rolled steel, nylon-bushed pin, and CubeLok locking mechanism are all engineered for decades of use in harsh Australian conditions.
The FG6 is available in configurations for 25NB and 32NB gates, fitting 80NB, 100NB, and 150NB posts. Farmers regularly hang gates up to 6 metres. For extra-long or heavy gates, the three-position CubeLok washer and optional screw-fix points on the straps provide additional rigidity.
Most competing bolt-on hinges rely on friction alone to hold the pin position, which means they gradually slip and sag over time. The FG6’s patented CubeLok washer physically locks the pin into one of three positions, preventing movement entirely. Other key differences: the FG6 uses a 75mm nylon-bushed pin (vs. bare steel pins that rust), 6mm hot rolled steel straps (vs. 5mm), and a long nut for twice the holding power. It’s also the only bolt-on hinge set that’s fully adjustable, so if conditions change, you can correct the gate angle without removing it.
That’s exactly what the 140mm of vertical adjustment is for. You can raise or lower the gate angle at any time to account for uneven ground, seasonal ground movement, or post shift. No need to re-weld or start over. Just loosen, adjust and lock.
Yes. The FG6 is designed to support extra-long and heavy gates. The CubeLok washer locks into three positions to prevent any movement under load, and the hinge straps include predrilled holes for adding screws for extra rigidity on particularly large gates. Farmers regularly use them on gates up to 6 metres.
About 15 minutes. All you need is a 19mm socket or spanner. No welding, no drilling, no power tools. The FG6 can also be removed, adjusted, or repositioned at any time using the same tool.
Yes. The FG6 locks the pin in place both horizontally and vertically: bolted, not just clamped. Combined with 6mm hot rolled steel straps (20% stronger than competitors) and a long nut with twice the holding power of a standard nut, the FG6 matches or exceeds the strength of a welded hinge. Farmers have successfully hung 6-metre gates using the FG6.