Adams Rite MS1850S-310-628 Door Deadlock, Flat Faceplate, Straightbolt, Non-Handed, 1-1/8" Backset, Clear Anodized, For Aluminum Door

The Adams Rite MS1850S-310-628 is a mechanical mortise deadlock designed to secure single-leaf narrow-stile aluminum doors. Featuring a 1-1/8-inch backset, non-handed straight bolt, flat faceplate, and 628 clear anodized finish, the lock uses an eight-ply laminated stainless steel bolt with a 1-3/8-inch throw. Its counterbalanced pivot mechanism operates through a 360-degree key or thumbturn rotation and accepts compatible 1-5/32-inch diameter mortise cylinders with an MS cam. Cylinders, thumbturns, and strike plates are sold separately.

Adams Rite MS1850S-310-628 MS Deadlock, 1-1/8-Inch Backset, Clear Anodized

The Adams Rite MS1850S-310-628 MS Series mortise deadlock provides mechanical locking for single-leaf narrow-stile aluminum doors in commercial storefronts, office buildings, retail facilities, and institutional entrances. This configuration combines a 1-1/8-inch backset, straight deadbolt, flat faceplate, and 628 clear anodized finish in a non-handed lock assembly suitable for left- or right-hand door installations. Its counterbalanced pivot mechanism projects a laminated stainless steel bolt into the door jamb, securing the opening without electrical power. The MS1850S Series is designed for applications requiring a long-throw deadbolt, including narrow-stile doors where frame clearance and door flexibility affect locking hardware selection.

The MS1850S-310-628 features an eight-ply laminated stainless steel straight bolt measuring 5/8 inch thick, 1-3/8 inches wide, and 2-7/8 inches long, with a 1-3/8-inch bolt throw. The center laminate incorporates an alumina-ceramic core designed to resist cutting attacks, including those involving hardened hacksaw blades. Its steel lock case features corrosion-resistant plating and measures 1 inch wide by 6 inches high, with case depth determined by the 1-1/8-inch backset. The supplied flat faceplate measures 1 inch wide by 6-7/8 inches long and has a 628 clear anodized aluminum finish. The non-handed configuration simplifies replacement on compatible narrow-stile door preparations.

The Adams Rite MS1850S mechanical deadlock operates through a 360-degree rotation of a compatible mortise cylinder key or thumbturn, projecting or retracting the counterbalanced bolt. The key can be removed only when the bolt reaches its fully locked or unlocked position, providing a defined mechanical locking state. The lock accepts standard 1-inch-long, 1-5/32-inch-diameter mortise cylinders equipped with an Adams Rite MS cam, including compatible 4036 mortise cylinders and 4066 thumbturns. Cylinder operation is supported from either or both sides of the door, depending on the selected hardware. The lock is supplied with its flat faceplate and mounting screws; cylinders, thumbturns, cylinder guards, and strike plates must be ordered separately.

The Adams Rite MS1850S-310-628 narrow-stile door deadlock supports installation in compatible aluminum door stiles using the manufacturer's specified mounting preparation, fastening hardware, and cylinder alignment requirements. Related accessories include the 4000, 4001, and MS4002 deadlock strikes, along with the 4015 threshold bolt and 4016 header bolt for compatible multipoint locking applications. The standard MS1850S straight-bolt configuration differs from the MS1850S-X5X hookbolt version, which is designed to resist separation of sliding doors from their jambs, and the 1850S-X2X short-throw version. For replacement installations, verify the existing 1-1/8-inch backset, flat faceplate dimensions, straight-bolt configuration, cylinder cam compatibility, and required strike preparation. Installation must comply with applicable building, fire, and emergency egress regulations.