This Indian Standard specifies the requirements for materials, dimensions, manufacture, and finish of rim latches used on doors. It is primarily used by hardware manufacturers, architects, and quality inspectors to ensure proper fit, function, and durability of builder hardware.
Specification For Rim Latches
Quick Reference Values
size denominationBased on overall length of the case
typical sizes75 mm, 100 mm, 125 mm, 150 mm
fixing screw typeCountersunk head wood screws
Practical Notes
Verify the handing (left or right) of the door before ordering rim latches, as certain mechanisms may not be reversible.
Ensure compatibility of the latch finish with other door hardware (hinges, handles) to maintain aesthetic consistency and prevent galvanic corrosion.
For exterior or humid environments, specify non-ferrous materials like brass or aluminium to prevent rusting of the latch case.