Norton Rixson 993M Electromagnetic Door Holder, Surface or Concealed Mounting, Sprayed Aluminum

Keep high‑traffic doors reliably open or released when needed with the Norton Rixson 993M electromagnetic door holder. Designed for commercial and institutional security and access control, this door holder delivers a powerful 300 lb holding force and a 5-1/4" (133 mm) projection to accommodate common door clearances. The heavy‑duty armature plate is through‑bolted for consistent contact with the magnet and includes an adjustable screw for precise alignment, minimizing rework during installation. A 4-1/2" x 4-9/16" x 2-1/2" switch box is included to simplify wiring to fire alarm, access control, or monitoring systems; the unit also ships with a test switch (available without for frequent manual release) and supports key‑switch manual release. Surface or concealed mounting options make the 993M versatile for retrofits, corridors, and secure areas where surveillance and reliable door control are required. Specify Norton Rixson 993M for robust, serviceable door holding in security, safety, and access control applications — contact us to order or to confirm mounting requirements and reinforcement needs.

• Securely holds doors in position with a 300 lb magnetic hold, reducing damage and improving traffic flow
• Adjustable heavy‑duty armature with through‑bolted plate for consistent contact and precise alignment
• Surface or concealed mounting flexibility adapts to diverse site conditions and retrofit projects
• Integrated switch box simplifies wiring and integration with fire, access control and monitoring systems
• Durable sprayed‑aluminum finish and commercial construction for long service life in high‑use environments