RCI ARMB155 Armature Bolts, 2-1/8" (55mm) for Doors 1-3/4"-2-1/4" (44-57mm) Thick

Built to deliver consistent locking performance, the RCI by dormakaba ARMB155 armature bolt is an essential magnetic lock part for professional access control systems. This armature bolt provides a secure, precision-mounted connection between the armature plate and electromagnetic lock, helping ensure reliable holding force and reduced door sag that can compromise security and monitoring accuracy. At 2-1/8" (55 mm) in length, the ARMB155 is engineered for doors 1-3/4" to 2-1/4" (44–57 mm) thick, making it an ideal choice for both retrofit projects and new installations.

Manufactured to RCI by dormakaba standards, the ARMB155 is compatible with multiple electromagnetic lock models (including 8310, 8310-IQ, DE8310, EW8310, 8371, 8380), which streamlines procurement and installation for integrators and facilities teams. Available in black or silver finishes, the bolt maintains a discreet, professional look in corporate, institutional, and high-security environments. Use this armature bolt to improve the longevity and reliability of your magnetic lock assemblies and support your overall security, surveillance, and access control strategy. Order the ARMB155 today to standardize your installations and reduce field maintenance.

• Ensures a secure, aligned connection between armature plate and electromagnetic lock for dependable access control
• Precision 55 mm (2-1/8") length fits doors 1-3/4" to 2-1/4" (44–57 mm) thick, simplifying retrofit and new installations
• OEM compatibility with popular RCI models (8310, 8310-IQ, DE8310, EW8310, 8371, 8380) reduces installation time and troubleshooting
• Durable finish options (black or silver) resist wear and maintain professional aesthetics in high-traffic security environments
• Easy to install fastening design minimizes service calls and supports long-term reliability for monitoring and surveillance systems