4” Polished 316 Stainless Steel Heavy-Duty Butt Hinge with POM Bushes

 this heavy-duty 4-inch butt hinge has been through several rounds of refinement and testing to deliver strong performance in demanding coastal and external environments. Manufactured in marine-grade 316 stainless steel with a highly polished finish and POM bushes, it is designed for smooth, reliable operation and long service life.

Unlike many conventional “316” ball-bearing hinges, where the bearings themselves are often the weak point and can bleed rust through the knuckle, this hinge uses a POM-bushed design to help avoid hidden bearing corrosion and reduce metal-to-metal wear. The polished finish also helps reduce the surface contamination issues sometimes seen on lower-quality brushed stainless hinges.

These hinges have been tested and rated at 160 kg per pair, with a durability test of 200,000 cycles, making them a strong choice for heavy-duty doors in exposed or high-use environments.

Designed for long service life in demanding conditions, they are ideal for coastal properties, external doors, humid environments, bathrooms, marine settings, and premium architectural applications where both appearance and corrosion resistance matter.