Match the 2.50 mm polyamide screw pair to the existing fitting, align the parts carefully, engage the threads without forcing them, and tighten only until the assembly is secure.
When to use
Use when a compatible spectacle fitting requires a 2.50 mm polyamide screw pair for replacement or reassembly.
Where to use
Use only on spectacle fittings designed for a compatible 2.50 mm polyamide screw pair.
