Ceramic standoff Ø10 × 20 mm, Ø4.3 hole (M4) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/ceramic-standoff/  (CC BY 4.0)
Basis: Standoff Ø10 × 20 with an ISO 273 fine M4 clearance hole (Ø4.3)
Catalog version: 2026-10-20

Sizes: see table below
- The file is a Ø10 × 20 mm cylinder with a Ø4.3 through hole, the ISO 273 fine clearance for an M4 screw.
- Standoffs of this kind come in Ø6–12 × 10–30 mm.
- They space the hot end off a frame so heat does not conduct into it; I use two on the cold-side mounts.

standoff  od_mm  length_mm  hole_mm  screw
ceramic-standoff-10x20  10  20  4.3  M4

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Wikipedia: Mesh (scale) — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Mesh_(scale)
- Wikipedia: Regenerative heat exchanger — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Regenerative_heat_exchanger
- Wikipedia: Steel wool — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Steel_wool
- McMaster-Carr: Wire cloth (free STEP per part, for your own design use; no redistribution) — STEP, PDF — McMaster-Carr site terms [verify license at link] — https://www.mcmaster.com/products/wire-cloth/
- Long Earth Society: Engine and rig builds — web, video — LES site — https://longearthsociety.com/engineering/

Free files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/ceramic-standoff/index.json
API: https://xemstudio.com/api/geometry?object=ceramic-standoff