4085 Header Bolt (Pairs of Doors Only)

Description: Top-of-Door third locking point for pairs of doors when working in conjunction with an MS® pivoted bolt deadlock and 4015 Threshold Bolt in the active leaf.

Function: Designed to add a top-of-door third locking point for pairs of doors with an MS® pivoted bolt deadlock and 4015 Threshold bolt in the active leaf. The 4085 Header Bolt is mounted in the inactive leaf. This additional bolt, triggered by the pivoted MS® bolt, expands in a “scissors” action to center itself in its strike as it rises. This action saves the key holder from the difficulty of lining up the doors with three separate strikes, even if doors are misaligned due to faulty installation or settling. The three-point features may be added to any basic MS1850S/MS1850SN or MS1950 deadlock.

Operation: 360° turn of key or thumbturn in basic MS® deadlock throws counterbalanced bolt into opposite door, kicking positioner bolt into header strike. Positioner bolt may be manually thrown before closing active leaf to reduce effort on key-bow. Key can be removed only when bolts are in a positively locked or unlocked position.


Header Bolt: 1/2” x 1-1/2” expanding bolt with 5/8” throw. Housed in 1-1/2” x 2-3/4” x 5/8” case.

Adjustment: Minor adjustment of rod length is accomplished by turning nylon rod end.

Standard Package: Packed separately with rod guide, screws, and header strike.  Shipping weight: 1 lb.


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

4015 Threshold Bolt available separately.

Compatible Products: This product is compatible with the following products:


Adams Rite Deadlocks including: MS1850S(-050), MS1850SN(-050), MS1950(-050).

Not applicable to 7/8” backset locks.