OBO Bettermann Brass Reducer M25 to M16, Metric Thread, IP65, Halogen-Free 2089548

Connecting conduits or cable glands with different thread sizes often forces compromises—adapters that leak, corrode, or fail under temperature swings. The OBO Bettermann Brass Reducer 167 R MS M25-16 solves this by providing a robust, precision-machined brass transition from M25 male to M16 female metric threads. It ensures a tight, durable seal for electrical installations, keeping out dust and moisture while maintaining full mechanical integrity.

Who is it for

Electricians, panel builders, and maintenance technicians who need to reduce conduit or gland sizes in industrial, commercial, or outdoor environments. It suits anyone requiring a reliable, halogen-free, and RoHS-compliant connection in cable management systems.

Main features

• Precision-machined from high-quality brass (CuZn39Pb3) for excellent corrosion resistance and conductivity.
• Metric external thread M25 x 1.5 to metric internal thread M16 x 1.5, compliant with EN 60423.
• IP65 protection when used with suitable sealing, ensuring dust-tight and water-jet resistance.
• Wide operating temperature range from -25 °C to +100 °C for demanding environments.
• Halogen-free and RoHS compliant, supporting safe and sustainable installations.
• Hexagon wrench size SW 27 for easy tightening; overall length 20 mm, largest outer diameter 30 mm.

Specifications

• Brand: OBO Bettermann
• Model: 2089548
• MPN: 2089548
• EAN: 4012195475576
• Product type: Reducer / Reducing nipple
• Material: Brass (CuZn39Pb3)
• Larger thread: M25 (external, metric)
• Smaller thread: M16 (internal, metric)
• Thread pitch: 1.5 mm
• Protection class: IP65 (with suitable sealing)
• Operating temperature: -25 to +100 °C
• Surface finish: Untreated / natural brass
• Wrench size: SW 27
• Overall length: 20 mm
• Largest outer diameter: 30 mm
• Halogen-free: Yes
• RoHS compliant: Yes
• Colour: Brass / gold-coloured
• Standard compliance: EN 60423

Tips

For optimal sealing, pair this reducer with appropriate O-rings or sealing washers and tighten to the recommended torque. Inspect threads before installation to avoid cross-threading. In outdoor applications, consider additional protection against aggressive chemicals if the environment is highly corrosive.