Deltana S35HD1B Square Hinge Heavy Duty 3.5x3.5 Flat Black

Product Description

The DELTANA S35HD1B is a heavy-duty square door hinge finished in flat black, designed for commercial and residential door installations where durability and clean geometry are required. Measuring 3.5 x 3.5 inches, this hinge is built for demanding applications where standard-duty hinges fall short. It ships as a pair, making it straightforward to order by the door. Licensed carpenters, finish contractors, and door hardware installers specify this type of hinge on both interior and exterior door assemblies that see high cycle counts or elevated load requirements.

The S35HD1B suits residential entry doors, commercial interior doors, and institutional applications where a flat black finish coordinates with contemporary or industrial-style hardware sets. Its square corner profile fits mortised door prep on standard wood and hollow metal door frames. The heavy-duty classification makes it appropriate for heavier door slabs where standard-weight hinges are undersized for the application.

Key Features

• Heavy-duty construction rated for higher cycle counts and heavier door slabs than standard hinges
• 3.5 x 3.5 inch square corner profile fits standard mortise prep on wood and hollow metal frames
• Flat black finish provides a clean, consistent appearance on contemporary and industrial hardware sets
• Sold as a pair, simplifying per-door ordering
• Package dimensions of 5 x 2.2 x 1 inches support compact storage and jobsite handling

Compatibility

Designed as an OEM-style replacement or new-installation hinge for doors prepped to accept a 3.5 x 3.5 inch square-corner mortise hinge.

Installation Notes

Installation is performed by licensed carpenters or door hardware technicians. Remove the door and secure it safely before routing or chiseling the mortise to accept the hinge leaf. Ensure the door frame and door slab mortises are clean, flat, and correctly aligned before fastening. Follow applicable building codes for door hardware on rated assemblies.