This standard specifies the requirements for materials, dimensions, manufacture, workmanship, and finish of metallic tower bolts used as builder's hardware in doors, windows, and shutters.
Specifies materials, dimensions, finishes and testing of metallic tower bolts for doors and windows.
Quick Reference Values
Standard length designation50, 75, 100, 150, 200, 250, and 300 mm
Length tolerance (up to 100mm)± 1 mm
Length tolerance (above 100mm)± 2 mm
Practical Notes
Screws used for fixing should strictly match the material and finish of the tower bolt to avoid galvanic corrosion (e.g., do not use mild steel screws with aluminium bolts).
Ensure the keep (socket/staple) is perfectly aligned with the shooting bolt during installation to prevent binding and ensure smooth operation.