Adams Rite B1921 Reinforced Pivot

Adams Rite B1921 Reinforcing Pivot is engineered for optimal performance in aluminum stile doors, enhancing security and functionality. This pivot features a 1/2" offset to align perfectly with the pivot point of a 4" wide hinge, ensuring smooth operation and longevity. Designed to prevent the accidental locking of the inactive leaf in paired doors, this pivot includes a robust cylinder-operated flushbolt, making it an essential component for secure commercial installations. The cylinder backset options of 31/32" or 1-1/8" cater to various needs, while the standard cylinder height of 12" allows for ± 1-1/4" adjustment, with additional lengths available upon request. Constructed from steel with a corrosion-resistant plating, the case measures 1" x 6" and varies in depth based on the backset. The stainless steel bolt features a hexagonal design with a 3/8" flat to flat and a 11/16" throw, ensuring reliable performance. For installation, a 1/2" diameter strike hole accommodates metal thresholds, while a wood threshold option is also available. Each standard package includes the basic lock mechanism with an attached actuator arm, along with the necessary mounting screws and installation instructions. The Adams Rite B1921 Pivot combines durability and functionality, making it a trusted choice for commercial applications.

Reinforcing Pivot

Reinforcing Pivot, 1/2" Offset to match Pivot Point of 4" Wide Hinge

The 1870 Cylinder-Operated Flushbolt is designed for aluminum stile doors.

Prevents accidental locking of the inactive leaf of paired doors.

• Cylinder Backset: 31/32” or 1-1/8” only
• Cylinder Height: Standard length (cylinder center to retracted bolt tip) is 12” with ± 1-1/4” adjustment. Other lengths available by special order.
• Case: Measures 1” x 6” x depth.  Depth varies by backset (see table on catalog page). Steel with corrosion-resistant plating.
• Bolt: Hexagonal 3/8” flat to flat, with 11/16” throw. Made of stainless steel.
• Strike: 1/2” diameter hole in metal threshold or header is suitable. For wood thresholds, 4005 strike is available separately.
• Faceplate: Measures 1" x 6-7/8".
• Cylinder Cam: Operable by any standard mortise cylinder with MS® cam, dimensioned as shown. Cylinders with MS® cams can be readily obtained from most cylinder manufacturers. See CYLINDERS for cylinder make, thumbturn and trim ring information.
• Standard Package: Basic lock mechanism boxed with actuator arm attached, rod/bolt assembly unattached. Stainless steel bolt guide, mounting screws, and installation instructions included. Cylinders available separately. Shipping weight: 1-1/4 lbs.

Resources

• 1870 Cylinder-Operated Flushbolt Installation Instructions
• 1870HM Series Cylinder Operated Flushbolt Installation Instructions
• 1877 Cylinder-Operated Flushbolt for Wood Doors Installation Instructions
• B1921, B1923 Full Surface Reinvorcing Pivot Hinges Installation Instructions
• Flushbolts and Pivots Cut Sheet
• MS1880, MS1881 Two-Point Flushbolt Installation Instructions