The Schlage XQ07-351 is the OEM flat lip option for the 10-025 strike on the ND Series, AL Series, and A Series cylindrical locks, confirmed in the official Allegion Knowledge Base article "Is there a flat lip option for the ND series?" and in the Schlage Commercial Price Book under the ND-Series/AL-Series/A-Series cylindrical lock section. The lip is 7/8 inches in length, flat profile. Finish must be specified.

The 10-025 is the standard Schlage cylindrical lock strike body that ships with ND, AL, and A Series locks. The XQ07-351 is not a replacement for the 10-025 strike body - it is the flat lip configuration of that strike. Confirm that the door frame installation requires a flat lip before ordering.

Flat Lip vs Curved Lip: Why the Strike Lip Profile Matters

A standard ND Series strike (10-025) ships with a curved lip from the factory. The curved lip angles away from the strike box face, creating a ramp that guides the spring latch bolt over the lip and into the keeper box as the door swings closed. This curved profile works correctly on doors where the door stop is set back from the frame face, which is the standard hollow metal door frame configuration.

A flat lip strike has no angled ramp - the lip is perpendicular to the strike box and sits flush with the frame face. Flat lip strikes are specified for installations where:

The door stop is in the same plane as the frame face, leaving no set-back clearance for a curved lip to project into. Aluminum storefront and curtain wall frames frequently use this configuration. Older commercial steel frames with specific stop geometry may also require a flat lip. When a curved lip is installed on a frame that needs a flat lip, the door either fails to close fully against the stop or the latch bolt drags on the curved lip and causes premature latch wear.

Schlage XQ07-351: The 10-025 Strike Flat Lip Option

The Schlage cylindrical lock strike catalog has two flat lip options, each for a different strike body. The official Allegion Knowledge Base documents them as follows:

XQ02-309 = Flat lip option for the 10-013 strike, 7/8 inch. The 10-013 is the smaller or older-format strike body used with specific Schlage cylindrical lock series.

XQ07-351 (this product) = Flat lip option for the 10-025 strike, 7/8 inch. The 10-025 is the standard strike body for the current ND Series, AL Series, and A Series cylindrical locks.

Using XQ02-309 for a 10-025 installation or XQ07-351 for a 10-013 installation will result in a strike that does not fit the strike body correctly. Confirm the installed strike body (10-025 or 10-013) before selecting between these two options.

Schlage ND Series Parts: Strike Finish and Lip Length Selection

The Schlage Commercial Price Book listing for the XQ07-351 notes "Specify lip length," indicating that other flat lip lengths are available for the 10-025 strike beyond the 7/8 inch configuration. The 7/8 inch is the shortest standard flat lip length. Longer flat lip lengths are used when the frame geometry requires more coverage between the strike box and the door edge stop position.

The XQ07-351 is available in multiple finishes to match the installed cylindrical lock and frame hardware: 605 (Bright Brass), 606 (Satin Brass), 612 (Satin Bronze), 613 (Oil Rubbed Bronze), 625 (Bright Chrome), and 626 (Satin Chrome). Select the finish that matches the installed lock and frame hardware for a consistent appearance. Finish must be specified at time of order.

SecurityParts stocks OEM Schlage ND Series and AL Series cylindrical lock strikes and frame hardware. Free shipping on orders over $450.