König & Meyer Reducing Thread Adapter M25 to M20, Zinc-Plated Brass, IP68, 21918-000-29

In industrial cable gland systems and enclosure technology, connecting components with different thread sizes often requires a reliable adapter. The König & Meyer 21918-000-29 reducing thread adapter enables a secure transition from an M25 outer thread to an M20 inner thread, both with a 1.5 mm pitch. Machined from brass and zinc-plated for corrosion resistance, this adapter is suited for demanding installations where dust-tight and submersible connections are required.

Key specifications

• Outer thread: M25 x 1.5 mm
• Inner thread: M20 x 1.5 mm
• Material: Brass, zinc-plated (galvanized)
• Protection rating: IP68 (dust-tight, submersible)
• Operating temperature: -40°C to +100°C
• Overall length: 15 mm
• Wrench size (outer hexagon): 30 mm (SW30)
• Thread standard: Metric ISO fine thread
• Mounting type: Screw-in, right-hand thread

Why choose it

This adapter provides a robust, leak-proof connection between M25 and M20 threaded components. The zinc-plated brass construction offers durability and resistance to environmental factors, while the IP68 rating ensures protection against dust and continuous immersion in water. Its compact 15 mm length allows installation in tight spaces.

Ideal use cases

• Cable gland systems requiring size reduction
• Enclosure technology and industrial installations
• Applications needing IP68-rated connections

Good to know

The adapter features a 30 mm hexagon for easy tightening with a standard wrench. It is part of the UNI Dicht series and complies with RoHS and REACH regulations.