Sargent 815 RHR Open Back Strike — 8900 Series Mortise Exit Device, Black Finish

The Sargent 815 Open Back Strike is a replacement and new-installation strike plate designed specifically for the Sargent 8900 Series mortise lock exit device. This listing is for the Right Hand Reverse (RHR) active door opening configuration. The open back design accommodates installations where a full box strike is not required or where frame conditions call for a lighter strike profile.

The 8900 Series is Sargent's wide-stile mortise lock exit device family for metal doors, combining a concealed mortise latch bolt with panic egress function. Keeping the correct handed strike matched to the active leaf is critical for proper latch engagement and code-compliant egress performance.

What Is an Open Back Strike?

An open back strike (also called a lip strike or open-lip strike) does not enclose the latch bolt pocket on all sides — the back of the strike is open to the frame cavity. This simplifies installation in certain hollow metal frame conditions and reduces the frame prep required compared to a full box strike. It is the standard field-replacement strike type for many mortise exit device applications.

Handing — RHR Active Door

Exit device strikes are handed. Right Hand Reverse (RHR) describes a door that, when viewed from the secure side (outside / key side), is hinged on the right and swings away from you. Always confirm handing before ordering — installing a strike with incorrect handing will prevent positive latch engagement and can cause egress failure. If you need the opposite hand, a separate LHR (Left Hand Reverse) version is required.

Key Features

• Designed for Sargent 8900 Series mortise lock exit devices — wide stile, metal door applications
• Open back strike profile — accommodates standard hollow metal frame conditions
• RHR handing — for right hand reverse active door openings
• Black finish — coordinates with dark or painted frame finishes
• Ensures positive latch engagement required for fire-rated and panic egress openings

Typical Applications

• Replacement strike for existing Sargent 8900 Series exit device installations
• New construction or renovation projects specifying 8900 Series mortise exit hardware on wide-stile metal doors
• Commercial, institutional, and industrial facilities requiring code-compliant egress hardware
• Fire-rated door assemblies where the exit device and frame prep call for an open back mortise strike

Compatibility Note

This strike is specific to the Sargent 8900 Series. It is not interchangeable with rim exit device strikes, surface vertical rod (SVR) strikes, or concealed vertical rod (CVR) top/bottom strikes. Verify your exit device series and model before ordering. If you are unsure of your existing device series, the model number is typically stamped on the center case or end cap of the device.

Technical Details

Need a comparable alternative? DoorwaysPlus can quote open back strikes from preferred lines including Corbin Russwin and Hager for similar mortise exit device applications — contact our team for availability and cross-reference assistance.