Stainless Steel Hinge AISI316 – 72×40 mm, 2 mm Thick (Marine-Grade Hinge)

This AISI316 stainless steel hinge (72×40 mm) is an excellent choice when you need a blend of strength and moderate size. At 72 mm in length, it provides a bit more leverage and support than shorter 60 mm hinges, making it suitable for slightly heavier lids or doors while still remaining relatively compact. The use of premium 316 stainless steel ensures the hinge won’t rust or weaken, even when installed in exposed locations – be it on deck, the transom, or bow lockers constantly sprayed by saltwater.

The polished finish keeps the hinge moving freely and prevents grime buildup, ensuring low maintenance. With a thickness of 2 mm, the hinge leaves stay rigid under load and do not flex, keeping the hinge action tight and precise. Four mounting holes (two per leaf) are strategically placed to allow screws to secure the hinge firmly, eliminating unwanted wobble or rattling even when the boat’s engine is running or the sea gets rough. This model is very versatile – it can be mounted on almost any surface (fiberglass, wood, or aluminum) once pilot holes are prepared, using the appropriate stainless steel screws.

• Applications: The 72×40 mm hinge is well-suited for medium-sized deck hatches, livewell lids, under-seat storage compartments, or tank access panels on boats around 5–7 m. It provides extra assurance for panels that carry a bit more weight or see frequent use – for example, a fish locker lid that is opened multiple times a day, or a gear storage hatch on a day cruiser.
• Advantages: Compared to smaller hinges, this 72 mm hinge distributes weight more effectively and reduces wear when opened often. On the other hand, it’s lighter and more compact than the largest hinges, making it a good middle-ground choice for applications where you want reliability without excessive weight or bulk. It’s a smart upgrade from standard hinges that may have come with your boat if you need greater durability.
• Installation: We recommend using all four mounting holes with quality stainless fasteners to maximize holding strength. For hatch installations, two of these hinges spaced evenly can support the cover with smooth, even opening and closing, without causing the lid to twist. If you’re replacing an existing corroded hinge of roughly ~70 mm length, this model will likely fit the same space and immediately improve the longevity and appearance of your hardware. By installing the 72×40 mm hinge, you ensure your boat’s moving panels remain secure and easy to operate over the long haul.