McKinney DLS-8 Combination Strike and Stop, Center Hung

No. The DLS-8 combination strike and stop cannot be used with deadbolts. It is built for cylindrical or bored locks, and where it is made for a mortise lock it is only for the no-deadbolt functions. If the opening needs a deadbolt, this strike is the wrong part for it.

Latch bolt location on the DLS-8 is set for 5-3/4 inch and 6-3/4 inch frame sizes, and those are the two versions ordered off the shelf. Frame sizes from 3-1/2 inch up to 10 inch can be made as custom units. Measure the frame face before you pick, since the latch bolt location is fixed to the size you order and a 5-3/4 unit will not line up on a 6-3/4 frame.

Center hung is the intended application, and the DLS-8 also works on doors set with a 1/8 inch inset. That geometry is what lets the door swing both directions. On a standard offset or butt hung door in a rabbeted frame, this is not the strike to use.

Yes, 1-3/4 inch doors are what the DLS-8 is made for. That is the standard commercial door thickness, so it suits typical institutional and multi-family openings. Thinner 1-3/8 inch residential doors are outside what this strike is built for.

It can be manufactured for Sargent 7900 and 8200, Corbin Russwin ML2000, and Yale 8800, in every case only in the no-deadbolt functions. Those are made-to-order, so when you place the order you have to specify both the lock and the model function. Guessing the function is the usual way this one gets ordered wrong.

On a center hung door that has to open in both directions, an ordinary strike and a separate stop fight each other, because the leaf swings past the frame face in one direction. The DLS-8 puts the latch keeper and the stop in one brass unit sized to the frame, so the latch catches on the in-swing and the stop takes the door on the out-swing. It is a rescue hardware application, the kind used on bathroom and patient room doors where staff need to get in if someone falls against the door.

Two things at minimum: the frame size, 5-3/4 inch or 6-3/4 inch, and if it is going on a mortise lock, the lock line and the model function. Frames between 3-1/2 and 10 inches go through as custom units. The lock type matters because the latch bolt cutout is located for the lock you name.

For a center hung or 1/8 inch inset door on a 1-3/4 inch leaf that has to open in both directions, yes, provided the lock is a cylindrical or bored lock, or one of the mortise lines it can be built for with no deadbolt function. If the door carries a deadbolt anywhere in the lock function, it is not compatible and you need a different approach. Match the frame size, 5-3/4 or 6-3/4 inch, to what is on the other doors so the facility stays standardized.

The DLS-8 uses 1/2 inch 8-32 machine screws. That is a machine thread, so the frame needs to be tapped for 8-32, not drilled for wood or sheet metal screws. On a hollow metal frame that is normal prep; on a wood frame you will need to handle the thread yourself.

Brass is the substrate on the DLS-8. It is a commercial-duty part, not a residential one, so it takes the traffic on institutional and multi-family openings where the door gets pushed both ways all day.