Adams Rite 91-0965 Universal Mounting Tab Kit, for Installing MS Locks and Latches, for Flat/Radius Stiles

The Adams Rite 91-0965 universal mounting tab kit is the purpose-built solution for installing MS series locks and latches into narrow stile aluminum doors with flat or radius stile profiles. Developed specifically as Method C mounting, this kit positions the lock at the edge of the door stile rather than through the face, which reduces drilling risk on glass doors and makes the installation process significantly more straightforward on retrofit projects. It works on aluminum door jambs, and it's equally compatible with metal and steel door applications. Mounting screws are included.

What are the three mounting methods for narrow stile aluminum doors?

Adams Rite identifies three primary methods for mounting locks and latches within the hollow tube stile of glass and aluminum doors. Method A and Method B involve drilling through the face of the stile at different depth profiles. Method C, which is what the 91-0965 supports, uses the edge of the door as the mounting reference point. This matters for several practical reasons. Edge-of-door mounting eliminates the need to drill through the stile face in locations that risk cracking or weakening the aluminum extrusion, particularly on narrow glass-inset doors where the stile wall thickness offers little margin. It also makes alignment simpler because the edge provides a consistent flat reference plane regardless of the stile's internal hollow geometry. For retrofit jobs where a door is already hung and the lock needs to be replaced or upgraded without removing the door from its frame, Method C is typically the fastest path to a clean installation.

Which Adams Rite MS locks and latches does the 91-0965 support?

The 91-0965 is designed for the full range of Adams Rite MS series deadlocks and deadlatches installed into narrow stile aluminum applications. This includes the Adams Rite MS1850 Series deadlocks, the Adams Rite MS1847 Series deadlatches, and related MS series hardware used across commercial storefronts, office entry doors, and institutional aluminum door systems. The kit works with both flat stile profiles (where the exterior face of the stile is planar) and radius stile profiles (where the exterior face curves outward), making it genuinely universal across the aluminum door types where these locks are commonly specified. Confirm your specific lock model and stile profile before ordering, as Adams Rite also offers the 91-0966 kit for beveled door applications where the stile geometry differs further.

Flat stile vs radius stile: what's the difference and why does it matter for installation?

Aluminum door stiles come in several profiles depending on the extrusion design the door manufacturer used. A flat stile has a straight, planar face where the lock faceplate seats flush without any gap or rocking. A radius stile has a convex curve across the face, which means a flat-backed lock case won't seat evenly without an adapter designed to bridge that curve. The 91-0965 addresses both profiles in a single kit, which is what makes it a universal solution rather than a profile-specific one. For facilities managers and locksmiths working across mixed door inventory — a common situation in commercial buildings with multiple entrance types — the ability to carry one kit that handles both profiles reduces parts overhead and installation delays. The full range of storefront bolts and latches that pair with this mounting kit is available to browse by series and application.

The 91-0965 is a small part that prevents a costly mistake. Specify it alongside any MS series lock installation on aluminum or steel doors where face-drilling risk or stile profile variation is a factor.