Imperial USA TH1100 Series Zinc Dummy Mortise Cylinder

The TH1100-DUM is a blank, non-keyed cylinder. There is no key and no cam action, so it fills the cylinder hole in a door, lock body, or exit device trim where you want the look of a cylinder without any locking function. Typical uses are inactive leaves of a pair, pull-side trim, or a storefront door where the keyed side is elsewhere. If you need the opening to actually lock and unlock, order a keyed TH1100 cylinder instead of the dummy.

No. For keys to work you need a keyed TH1100, which uses a 5 pin Schlage C keyway and can be ordered keyed different (X1), keyed alike as a single cylinder (X1KA), or keyed alike in pairs (X2). The DUM version has no plug or keyway at all. Order the dummy only for the side of the door that is meant to be inoperative.

Yes, the TH1100 Series is a commercial line. The body is zinc, and the series is built around storefront and aluminum door hardware, the keyed versions ship with an Adams Rite style cam and a 1 inch length.

The TH1100 Series covers both. The series is described as mortise or rim type, and the rim version, TH1100-RC, is packed with a collar ring, mounting plate, two screws and a flat tail piece cut to size. The dummy version, TH1100-DUM, is the non-functional filler and does not include that rim tailpiece kit.

Visually, if those cylinders are aluminum or Duranodic anodized, yes, those are the two finishes offered. The dummy shares the TH1100 Series body, so the face and ring profile match the keyed TH1100 cylinders on the adjacent doors. It will not accept a key, so it only matches cosmetically, not functionally.