Cantilever shelf plates for 15-series posts: 8 to 16 in reach — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/t-slot-cantilever-shelf-plates/  (CC BY 4.0)
Basis: Xem Studio design: a ¼ in triangular plate: its vertical leg bolts to the post, its top edge carries a 1515 shelf rail; 5/16-18 holes on the rail centre lines
Catalog version: 2026-10-20

Sizes: see table below
- One plate each side of the rail, or one on the outside; the rail then carries a shelf board.

reach_in  plate_in  holes
8  0.25  5
10  0.25  5
12  0.25  5
16  0.25  5

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- 80/20: 15 series T-slot profiles and fasteners (1.5 in rail, 5/16-18 hardware) — web — maker's catalogue; numbers cited — https://8020.net/1515.html

Free files (CC BY 4.0, Xem Studio; STEP + STL, 4 parts): https://xemstudio.com/files/hardware/t-slot-cantilever-shelf-plates/index.json
API: https://xemstudio.com/api/geometry?object=t-slot-cantilever-shelf-plates