Long Stainless Steel Hinge AISI316 – 135×40 mm, 2 mm Thick (For Heavy Hatches & Doors)

This impressively long 135 mm stainless steel hinge is the largest model in the range, designed to provide maximum support and strength for bulky and heavy components on board. With a width of 40 mm and a thickness of 2 mm, the hinge covers a large area of the surface it’s mounted to, distributing loads evenly. This is especially important for big hatches (such as a main deck hatch or cabin roof hatch) and for doors that experience significant pressure or very frequent use.

Constructed entirely from marine-grade AISI316 stainless steel, this hinge maintains its structural integrity and smooth articulation even in harsh marine environments – intense sun, salty spray, and constant humidity. Its mirror-polished surface not only enhances appearance but also acts as a defense against salt and dirt buildup, making cleaning and upkeep easier. Even on larger yachts where stresses are higher, this hinge won’t rust or bind, meaning your large lids and doors will continue to move freely when needed.

The heavy-duty design is complemented by multiple mounting holes – typically 6 holes (3 on each leaf) for screws or bolts, allowing the use of additional fasteners for extra strength. When properly installed, the hinge eliminates sagging in long doors and keeps panels flush and aligned. This is particularly valuable for movable platforms, folding gangways, or large windows (hatch screens) on yachts, where both safety and precision are required.

• Applications: The 135 mm hinge is purpose-built for large deck hatches (e.g., the main companionway hatch on a sailing yacht), engine compartment covers on powerboats, tall cabinet or locker doors, or fold-down tables/benches that demand rock-solid support. On boats over 7–8 m, this hinge provides the needed reinforcement for big components – for example, a swim platform that folds down can be mounted with two of these hinges to hold weight securely. If you have an engine room door or a transom door on a motor yacht, using a pair of 135 mm hinges ensures it can handle the strain of people passing through or rough sea conditions.
• Load & Safety: Thanks to its extended form, the hinge can absorb greater stresses and reduce the risk of concentrated pressure that could damage the hull or door. In heavy seas or during abrupt boat movements, large hatches secured with this hinge remain steadily closed or open in the intended position (if supported by a gas strut or latch) without twisting. This boosts safety on board by reducing the chance of sudden hinge failure and the potential dropping of heavy covers. When you’re dealing with sizable deck structures, a reliable hinge like this is critical to keeping everything in place and everyone safe.
• Installation & Maintenance: Install using high-strength stainless bolts or screws, utilizing all available mounting holes. Ensure the substrate (whether wood, fiberglass, or metal) is robust – if needed, use backing plates on the opposite side to spread the load of the fasteners. For maintenance, simple periodic cleaning and lubricating of the hinge pin with marine grease will suffice. This hinge is engineered to operate smoothly and remain corrosion-free even after years of service, so long as it’s occasionally cared for. With proper installation and minimal upkeep, it will perform flawlessly, supporting your vessel’s heavy hatches and doors through countless voyages.