Adams Rite 1871 Series Cylinder Operated Flushbolt - Radius Faceplate

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3.00 LBS
Width x Height x Depth:
2.00 (in)


3.00 (in)


9.00 (in)

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Adams Rite 1871 Series Cylinder Operated Flushbolt - Radius Faceplate

Designed for greater key control, the 1871 Cylinder-Operated Flushbolt prevents accidental locking of the inactive leaf of narrow stile aluminum paired doors. This door flush bolt may be installed to lock at threshold or at header.


Designed for use instead of conventional flip-lever operated flushbolts, 1871 Door Flush Bolt gives building management key control of the inactive leaf of paired narrow stile aluminum doors. Prevents casual locking of the inactive leaf by unauthorized persons. Uses same basic over-center action mechanism as MS® pivoted bolt deadlocks. Recommended for installation at both top and bottom of inactive door with MS1850S MS Deadlock in active door for greatest security. May be installed to lock at threshold or at header.


360° turn of key throws or retracts the hex-section bolt. Key can be removed only when bolt is in a positively locked or unlocked position. The 1871 Door Flush Bolt accepts any standard 1" [25.4 mm] length, 1-5/32" [29.4 mm] diameter mortise cylinder with MS® cam such as the 4036 Mortise Cylinder, or thumbturn such as the 4066 Thumbturn, available separately. Lock accepts cylinder from either or both sides.


Cylinder Backset

31/32" [24.6 mm] or 1-1/8" [28.6 mm] only.

Cylinder Height

Standard length (cylinder center to retracted bolt tip) is 12" [304.8 mm] with ± 1-1/4" [31.8 mm] adjustment. Please contact us for other lengths available by special order.


The case of the 1871 Door Flush Bolt is made of steel with a corrosion-resistant plating. Measures 1" x 6" x depth [25.4 mm x 152.4 mm x depth]. Depth varies by backset (see table below).


Stainless steel. Hexagonal 3/8" [9.5 mm] flat to flat, with 11/16" [17.5 mm] throw.


1/2" [12.7 mm] diameter hole in metal threshold or header is suitable. For wood thresholds, 4005 Strike is available separately.


Measures 1" x 6-7/8" [25.4 mm x 174.6 mm]. Available in choice of 313 Dark bronze anodized, 335 Black anodized, 628 Clear anodized.


Click here for our Definitive List of Door Hardware Finishes

Standard Package

Flushlock mechanism boxed with actuator arm attached, rod/bolt assembly unattached. Stainless steel bolt guide, mounting screws, and installation instructions included. Cylinder available separately.

Shipping Weight

1-1/4 lbs [.57 kg].

All measurements are approximate and are provided for informational purposes only. Refer to the product installation instructions

Adams Rite 1871 Door Flush Bolt Installation


Click here to download Adams Rite 1871 Catalog
Click here to download Adams Rite 1871 Installation Instructions
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