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Ceramic standoff Ø10 × 20 mm, Ø4.3 hole (M4)
What size ceramic standoff for M4 screws? · Hardware · basis: Standoff Ø10 × 20 with an ISO 273 fine M4 clearance hole (Ø4.3)
Long Earth Society build part. The regenerator packing and burner insulation on every LES engine. The engines
Exact dimensions. Every file is drawn at true size with no printing tolerance. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your printer's or process's clearance before making the part. Mating features
- sizes
- 1 in table
Notes
- 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.
Sizes
| standoff | od_mm | length_mm | hole_mm | screw |
|---|---|---|---|---|
| ceramic-standoff-10x20 | 10 | 20 | 4.3 | M4 |
Mating features
Drawn at the exact size. Open press, slide, run and socket features by your process's clearance; leave designed gaps and clamp fits as drawn.
| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| standoff hole | Ø4.3 | M4 screw clearance (ISO 273 fine) | designed | ceramic-standoff-* |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Wikipedia | Mesh (scale) | web | CC BY-SA 4.0 (text) |
| Wikipedia | Regenerative heat exchanger | web | CC BY-SA 4.0 (text) |
| Wikipedia | Steel wool | web | CC BY-SA 4.0 (text) |
| McMaster-Carr | Wire cloth (free STEP per part, for your own design use; no redistribution) | STEP, PDF | McMaster-Carr site terms verify |
| Long Earth Society | Engine and rig builds | web, video | LES site |
Free files
★ Free files 1 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| ceramic-standoff-10x20 | ceramic / steatite standoff Ø10 × 20, Ø4.3 hole (M4 clearance, ISO 273 fine) | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=ceramic-standoff
How it fits
Connects to
Socket head cap screws, M2–M8M4 screw through the Ø4.3 holeAlternatives
Threaded standoffs, M2.5 and M3metal standoffs where heat is not a concernAlso needed
Insulating firebrick 230 × 114 × 64 mmbase under the burnerYou might also need
Questions
What hole size for an M4 ceramic standoff?
Ø4.3, the ISO 273 fine clearance; the standoff is Ø10 × 20 mm.
What sizes do high-temperature standoffs come in?
Ø6–12 mm by 10–30 mm long; this file is Ø10 × 20.