Introduction: A 6-inch hidden door hinge fits a 35 mm interior door only when the door measures thicker than 35 mm, stays under 1000 mm wide, and weighs within 88 lbs per pair. A homeowner planning a flush interior door usually starts with the door slab already on sawhorses. The hinge looks right in the photo, but the fit comes down to three measurements: thickness at the hinge edge, width across the slab, and the weight the pair will carry. This 6-inch TamBee hinge has a narrow fit window: over 35 mm thick, under 1000 mm wide, and 88 lbs per pair. A door that measures exactly 35.0 mm misses the thickness requirement. The practical move is to measure first, then decide whether this hinge is the right match or whether the door plan needs a lighter core or a different hardware system. What the 6-Inch Hinge Dimensions Mean for a 35mm Door 1. A 35.0 mm Door Sits Outside the Over-35 mm Fit Window The thickness requirement is where most 35 mm door projects run into trouble. A door sold as ...