This standard specifies the requirements for materials, dimensions, manufacture, and finishes for mild steel butt hinges used in builders' hardware. It classifies hinges into light, medium, and heavy weights, detailing exact dimensional tolerances and screw configurations for proper fitment in doors, windows, and shutters.
Specifies requirements for mild steel butt hinges for general building purposes.
Quick Reference Values
standard lengths15 mm to 150 mm
number of knuckles for length under 50mm3
number of knuckles for length 50mm and above5
screw hole typeCountersunk to suit wood screws
tolerance on length up to 50mm± 0.5 mm
tolerance on length above 50mm± 1.0 mm
Practical Notes
Ensure screw holes are properly countersunk; flush seating of screw heads is critical to prevent binding when the door or window closes.
Always specify the weight class (Light, Medium, or Heavy) based on the shutter weight and expected frequency of use, not just the length.
For exterior use or moisture-prone areas, specify appropriate protective coatings (like galvanizing or powder coating) as raw MS hinges will rust easily.