316 Stainless Steel Take-Apart Marine Hinge - Mirror Polish (90x38mm)
Detachable Deck Hardware • Top Pick
Check PriceStandard hatch hardware fails at the pivot point during critical maintenance windows. Seized pins and corroded knuckles result in restricted access to engine compartments and storage lockers. In a marine environment, mechanical failure isn't just an inconvenience; it is a structural liability.
Generic zinc-plated or 304-grade hardware lacks the molybdenum content necessary to withstand chloride-induced pitting. Within 12 months of salt spray exposure, these inferior alloys develop crevice corrosion, leading to aesthetic degradation (rust bleeding) and eventual shear failure under load. Most stamped hinges provide insufficient plate thickness, resulting in flexing and misalignment of heavy composite hatches.
The solution is the 316 Stainless Steel Take-Apart Marine Hinge - Mirror Polish (90x38mm). This hardware is precision-cast from AISI 316 Marine Grade Alloy, engineered for lift-off functionality and maximum corrosion resistance. The 5mm thick plate construction ensures dimensional stability under high-torque applications.
Technical Comparison: Marine Grade vs. Standard Hardware
| Metric | 316 Stainless Steel Take-Apart Hinge (90x38mm) | Generic Alternatives (304/Zinc) |
|---|---|---|
| Material | AISI 316 Marine Grade | 304 Stainless / Zinc-Plated Steel |
| UV/Corrosion Resistance | High (Molybdenum Enhanced) | Low (Prone to Pitting) |
| Price | Premium Tier | Budget Tier |
Engineering Specifications
- Dimensions: 90mm (Length) x 38mm (Width)
- Material: Investment Cast AISI 316
- Finish: Ra < 0.2µm Mirror Polish
- Functionality: Take-apart (lift-off) design for rapid hatch removal
For integrated deck hardware systems, ensure compatibility with the 316 Stainless Steel Folding Boat Cleat - Flush Mount Flip-Up (5"/6"/8"). If your application requires fixed pivots rather than lift-off capability, refer to the Marine Grade 316 Stainless Steel Boat Butt Hinge - Mirror Polished (100mm) or the heavy-duty 316 Stainless Steel Boat Hinge - Mirror Polished Marine Casting (102mm).
- Molybdenum
- An alloying element added to 316 stainless steel to increase resistance to pitting and crevice corrosion in chloride-rich marine environments.
- Passivation
- A chemical process that removes exogenous iron from the surface of the steel, enhancing the protective chromium oxide layer.
Consult the Stainless Steel Guide for deeper analysis on alloy selection in high-salinity zones.
FAQ
- Will these hinges rust in high-salinity coastal environments?
- No. These hinges are cast from AISI 316 Stainless Steel, which includes molybdenum. This specific alloy is engineered to prevent pitting and crevice corrosion even when submerged or exposed to constant salt spray, unlike lower 304-grade alternatives.
- Are these strong enough for heavy engine room covers?
- Yes. Each hinge plate is 5mm thick—significantly more robust than standard 2mm or 3mm stamped hardware. This solid construction provides unwavering support for heavy marine hatches and cabinetry without flexing under stress.
- How do the 'left' and 'right' configurations work?
- The hinges are designed as a matching set (Left and Right) for lift-off functionality. By installing them as a pair, you can slide the door or hatch off its pins instantly for maintenance access without needing to unscrew the mounting plates.
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