Xem Studiomeasured geometry

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M8 nut trap (hex pocket for an ISO 4032 nut)

What size is an M8 nut trap? · Hardware · basis: Xem Studio design — geometry computed in the generator from traditional proportions

Also called: M8 nut trap, m8 nut trap, M8 nut trap dimensions, M8 hex pocket, M8 nut pocket 3d print, M8 nut size, nut trap, alojamiento tuerca M8, Mutternfalle M8, Sechskanttasche M8

Exact dimensions. True size, with no printing tolerance added.

length
21.0 mm
width
21.0 mm
height
12.8 mm

Notes

  • 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).
  • A hex pocket the size of an ISO 4032 M8 nut (13 mm across flats, 6.8 mm thick) with the screw hole through: the standard way to put a metal thread in a print.
  • Drawn at the nut's true size: add your printer's allowance to the pocket (often 0.2–0.4 mm on the flats) so the nut drops in.

M8 nut trap size chart

dimensionvalue
stock21 × 21 × 12.8 mm test block
partsblock, nut
hex pocket13 mm across flats (nut size), 6.8 mm deep (nut height)
screw holeØ8 mm (nominal M8)
nutISO 4032 M8: 13 mm AF, 6.8 mm thick
assemblesdrop the nut into the pocket, screw from below
holdsthe nut from turning while the screw is driven

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

Xem StudioJoinery design (geometry computed in the generator from traditional proportions)webXem Studio design

Free files

★ Free files 3 parts. Xem Studio design: free to use, print and sell things from; not to be republished as files. Xem Studio Design License. index.json

nut-trap-m8-blockBlock with a 13 mm hex pocket, 6.8 mm deep, and a Ø8 screw holeSTEP · STL
nut-trap-m8-nutM8 hex nut, 13 AF × 6.8STEP · STL
nut-trap-m8-assembledAll parts in their assembled position (each part its own solid)STEP · STL
Let your AI pull this. Add https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.
Set it up →

Plain text: sheet.txt · JSON: /api/geometry?object=nut-trap-m8

M8 nut trap (hex pocket for an ISO 4032 nut), isometric render of a generated part
Render of nut-trap-m8-assembled from the free STEP; not to scale.

Fits with

M8 captive nut slot (side-loaded), isometric render of a generated part
M8 captive nut slot (side-loaded)21.0×31.5×16.8 mm★ 3 files
Hex nuts, M2–M8 (ISO 4032), isometric render of a generated part
Hex nuts, M2–M8 (ISO 4032)7 sizes★ 7 files
Heat-set insert holes: hole cutters and test bosses for every insert size, isometric render of a generated part
Heat-set insert holes: hole cutters and test bosses for every insert size26 sizes★ 52 files

Questions

How big is an M8 nut trap?

13 mm across flats and 6.8 mm deep at true size, plus your fit allowance.

What size is an M8 nut?

ISO 4032 M8: 13 mm across flats, 6.8 mm thick.