Ribbed plastic expansion anchors (wall plugs): drill size, length and screw range — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/ribbed-plastic-expansion-anchors/  (sheet CC BY 4.0)
Basis: fischer SX Plus article table and Rawlplug UNO datasheet. Neither maker prints rib geometry, a collar diameter or a wall-thickness range, so no file
Catalog version: 2026-10-20

Sizes: see table below
- A ribbed plastic expansion anchor is a plug with ribs along its body: you drill a hole of the plug's diameter, push the plug in and drive a screw that spreads it against the hole wall. Tables below are two makers' published sizes (mm, inch in brackets, computed as mm / 25.4).
- Drill size d0 equals the plug diameter in both makers' tables (a 6 mm plug takes a 6 mm hole). The hole must be deeper than the plug: the maker's minimum drill depth (h1 / h0) is the plug length plus 10 mm for every Rawlplug UNO size and for fischer SX Plus up to 8 × 65, and plus 20 mm for SX Plus 10 × 50 and 12 × 60.
- The screw range is the thread diameter the maker prints for that plug (wood or chipboard screw). Rawlplug prints one diameter per pack, so some sizes show a single value.
- Not published and therefore not on this page: rib or fin dimensions, collar (flange) diameter, and a plasterboard or wall thickness range. These plugs are specified for the substrate depth of the hole, not the panel thickness; for thin panels see the plywood and drywall page and use a hollow-wall anchor.

maker / series  size (plug mm × length mm)  drill d0, mm (in)  min. hole depth, mm (in)  plug length, mm (in)  screw diameter, mm
fischer SX Plus  4 × 20  4 (0.157)  30 (1.181)  20 (0.787)  2.0 – 3.0
fischer SX Plus  5 × 25  5 (0.197)  35 (1.378)  25 (0.984)  3.0 – 4.0
fischer SX Plus  6 × 30  6 (0.236)  40 (1.575)  30 (1.181)  4.0 – 5.0
fischer SX Plus  6 × 50  6 (0.236)  60 (2.362)  50 (1.969)  4.0 – 5.0
fischer SX Plus  8 × 40  8 (0.315)  50 (1.969)  40 (1.575)  4.5 – 6.0
fischer SX Plus  8 × 65  8 (0.315)  75 (2.953)  65 (2.559)  4.5 – 6.0
fischer SX Plus  10 × 50  10 (0.394)  70 (2.756)  50 (1.969)  6.0 – 8.0
fischer SX Plus  12 × 60  12 (0.472)  80 (3.15)  60 (2.362)  8.0 – 10.0
Rawlplug UNO  Ø5  5 (0.197)  34 (1.339)  24 (0.945)  3.5
Rawlplug UNO  Ø6  6 (0.236)  38 (1.496)  28 (1.102)  4.0
Rawlplug UNO  Ø8  8 (0.315)  42 (1.654)  32 (1.26)  4.5 – 5.0
Rawlplug UNO  Ø10  10 (0.394)  46 (1.811)  36 (1.417)  5.0 – 6.0

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- fischer: Expansion plug SX Plus: article table (drill diameter d0, min. drill hole depth h1, anchor length l, screw diameter ds) — web — Publisher's page; dimensions are facts — https://www.fischer.co.uk/en-gb/products/standard-fixings/plastic-fixings/expansion-plug-sx-plus
- Rawlplug: UNO Universal Plug with Screw: product information and installation data (d, l, D, d0, h0) — web — Maker datasheet, hosted by a distributor; numbers only — https://static.chipdip.ru/lib/417/DOC025417841.pdf

No true-size file yet: the published figures do not fix the whole shape; a measured scan is planned.
API: https://xemstudio.com/api/geometry?object=ribbed-plastic-expansion-anchors