Keyhole hanger slot — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/keyhole-hanger-slot/  (sheet CC BY 4.0; files Xem Studio Design License, https://xemstudio.com/license/)
Basis: Xem Studio design — geometry computed in the generator from traditional proportions
Catalog version: 2026-10-20

Overall (mm): length 50.0, width 80.0, height 15.0
- Woodworking joint drawn for 3D printing: the parts lock together by shape, so a print can be joined without glue or screws. Drawn at true size with the parts line to line (zero gap) in their assembled position — add your printer's fit allowance to the mating faces (your AI or slicer can do this).
- The hidden hanger on the back of signs, frames and printed wall mounts: the screw head enters the round hole and the plate slides down so the head sits in the pocket behind the slot.
- Sized for a screw with a Ø4–4.5 mm shank and a head up to 9 mm (e.g. #8 / 4 mm pan or round heads); scale the three numbers for other screws.

dimension  value
stock  6 mm back plate
parts  plate, screw stand in
entry hole  Ø9 mm (passes the head)
slot  4.5 mm wide, 12 mm travel
head pocket  Ø9 mm, 3 mm deep behind the slot
assembles  over the screw head, slide down
holds  hangs flush on one screw; lift to remove

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Xem Studio: Joinery design (geometry computed in the generator from traditional proportions) — web — Xem Studio design — https://xemstudio.com/

Free files (Xem Studio Design License, Xem Studio; STEP + STL, 3 parts): https://xemstudio.com/files/hardware/keyhole-hanger-slot/index.json
API: https://xemstudio.com/api/geometry?object=keyhole-hanger-slot