Adams Rite 1877 Cylinder-Operated Flushbolt For Wood Doors - 1-1/4" backset

The Adams Rite 1877 is a cylinder-operated flushbolt for wood doors with a 1-1/4 inch backset, part of the Adams Rite 1870 Series of flushlocks. Unlike a conventional flip-lever flushbolt that anyone can flip open or closed, the 1877 is key-operated, which gives building management real control over the inactive leaf of a pair of doors. That single difference is the whole reason this flushbolt exists: it stops casual or unauthorized locking of the inactive leaf, including by children, so the inactive door stays exactly how facility staff set it.

What a cylinder-operated flushbolt does and why key control matters

On a pair of doors, one leaf is active (used for everyday entry) and one is inactive (normally kept bolted top and bottom). A standard flushbolt uses a flip lever, which means anyone can reach in and unbolt the inactive leaf, or accidentally lock it, creating security gaps or egress confusion. The 1877 replaces that flip lever with a keyed cylinder. A 360 degree turn of the key throws or retracts the hex-section bolt, and the key only comes out when the bolt is positively locked or unlocked, so there's no in-between state. The result is an inactive leaf that only authorized keyholders can operate.

It uses the same proven over-center action mechanism as Adams Rite's MS pivoted bolt deadlocks, so the action is solid and familiar. For the greatest security on a pair of wood doors, Adams Rite recommends the 1877 at both the top and bottom of the inactive leaf, paired with an MS1837 deadlock in the active leaf.

Adams Rite 1877 specifications

• Type: Cylinder-operated flushbolt for wood doors. Part of the 1870 Series flushlocks.

• Backset: 1-1/4 inch only.

• Operation: 360 degree key turn throws or retracts the bolt. Key removable only in a positively locked or unlocked position.

• Cylinder: Accepts any standard 1-5/32 inch mortise cylinder from either or both sides (cylinder not included). Cylinder must have an MS dimensioned cam, readily available from most cylinder makers.

• Cylinder height: Standard 13-1/2 inch from cylinder center to door edge.

• Bolt: Hexagonal, 3/8 inch flat to flat, 11/16 inch throw, stainless steel.

• Case: 1 inch by 6 inch by 1-29/32 inch, steel with corrosion-resistant plating.

• Strike: 2-1/4 inch by 15/16 inch strike supplied.

• Armored faceplate: 1-1/4 inch by 15-5/8 inch.

• Installation: Locks at threshold or header. Stainless steel bolt guide, mounting screws, and instructions included.

• Finishes: 628 clear anodized aluminum, 313 dark bronze anodized, 626 satin chrome.

Why specify the Adams Rite 1877

Adams Rite is the name in narrow-stile and storefront door hardware, and the 1870 Series flushlocks solve a specific real-world problem that flip-lever flushbolts create. On any pair of doors where the inactive leaf needs to stay secured and only open under key control, an entrance with foot traffic, a school, a retail back area, the 1877 gives management that control while the conventional flushbolt does not. The wood-door, 1-1/4 backset version covered here is the right pick when the inactive leaf is a wood door rather than narrow-stile aluminum.

Two things to confirm before ordering: the cylinder is not included, so you'll need a standard mortise cylinder with an MS cam from either side, and the 1877 is the 1-1/4 backset wood-door model specifically. If your inactive leaf is narrow-stile aluminum or hollow metal, a different 1870 Series flush bolt fits that better.

Order the Adams Rite 1877 from American Locksets

We stock the full Adams Rite 1870 Series from authorized distribution, so every flushbolt ships with a real manufacturer warranty. Compare the 1870, 1871, 1870HM, and 1877 in the Adams Rite 1870 Series category, or browse all commercial locks.