MS1880, MS1881 Two-Point Flushbolt

Description: MS1880 and MS1881 Two-Point Flushbolts offer greater convenience than flip-lever flushbolts. With one operation, they provide security and reduce human error.

Function: Used instead of flip-lever flushbolts in the inactive leaf of paired doors, the MS1880 and MS1881 offer greater convenience: one operation instead of two. It also promotes security by removing an element of human error. A positive blocking device makes it impossible to turn the key in the active door unless the inactive leaf has first been secured. This two-point flushbolt must be installed in conjunction with a pivoted bolt MS® deadlock. Cannot be unlocked when pivoted bolt is in locked position. Not to be used as a standalone locking mechanism.

Operation: Turn knob or lever 180° clockwise to throw hardened steel bolts into header and threshold and clear strike opening so pivoted MS® bolt can enter from active door. Counterclockwise turn retracts vertical bolts and blocks entry of pivoted bolt. Operates in conjunction with any MS® pivoting deadlock.


Turn Height: Matches cylinder height of MS® lock in active door.

Turn/Indicator: MS1880 has an hourglass shape for firmer finger grip. Finish is US26D Satin Chrome (682). Red background indicator has aluminum letters reading “LOCKED” (no message shown when unlocked). MS1881 has a teardrop shape lever with red letters on clear decal indicating unlock direction only.

Top and Bottom Bolts: Hexagonal 3/8” flat to flat. Stainless steel. Guides furnished. Bolt throw is 23/32”. Strike required in metal headers and thresholds is 1/2" diameter hole. For wood installation, two 4005 strikes required are available separately.

Interlock: All steel mechanism includes device to prevent entry of pivoted bolt until vertical bolts are locked and conversely, to prevent unlocking of vertical bolts when pivoted bolt is locked.

Options: For wood header or threshold order 4005 Strikes separately. For doors over 84” up to 120” Tall Door Kit TDK-1880 available separately.

Standard Package: Individually boxed with bolt guides and screws. Shipping weight: 2 lbs.


Related Products: When purchasing this product, please consider the following related products, available separately:

Accessories Deadlocks

TDK 1880 Tall Door Kit available separately.

MS1850S(-050), MS1850SN(-050), 1850S-020 (shortbolt), MS1950