2020 extrusion T-nuts (standard) screw size
M5 · 8 to 20 mm long
2020 extrusion T-nuts (standard) takes M5 metric screws in lengths from 8 to 20 mm.
Where it is used: the most common structural T-nut for 2020 framing.
This entry is marked confirmed and comes from tnutz.com.
For reference, M5 is 5 mm across the threads at 0.8 mm pitch. The imperial size people confuse it with: #10-32 (4.83 mm) — the other common rack thread; check before mixing.
2020 extrusion T-nuts (standard) screw specifications
One row per fitment record. Head, drive are shown only where the source states them; pitch is the ISO coarse pitch for the thread.
| Thread | Length | Pitch | Head | Drive | Where it goes | Status |
|---|---|---|---|---|---|---|
| M5 | 8–20 mm | 0.8 mm | not stated | not stated | the most common structural T-nut for 2020 framing | Confirmed |
Fitment records and sources
the most common structural T-nut for 2020 framing
pitch 0.8 mm · tap 4.2 mm · clearance 5.5 mm · PH2 / Torx T25
How to check the screw before you buy
- Into printed plastic, the screw either self-taps or needs a heat-set insert; machine screws straight into plastic strip easily.
- Diameter: across the threads an M5 screw measures about 5 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 0.8 mm from one thread crest to the next (12.5 crests per centimetre). A thread pitch gauge or the pitch-gauge tool settles it in seconds.
- Length: measure from under the head to the tip for pan, button, wafer and cap heads; countersunk (flat) heads are measured overall.
- The records span 8–20 mm, which means different positions take different lengths — match each hole to its own screw.
- Driver: the source does not name the drive. Standard M5 heads take PH2 for Phillips and T25 for Torx, and a 4 mm hex key for socket heads; a bit that fits loosely will cam out and strip the head.
- Tightening: no device-specific torque is published in these records. The site's general figure for M5 is about 4.0-6.0 N·m into metal threads and 1.5-2.5 N·m into plastic bosses; snug it up and stop.
Common mix-ups with M5
- 2020 extrusion end-tap holes vary between 4.2mm (M5) and 5mm (M6) core depending on manufacturer — always measure before tapping.
- M5x0.8 is the de facto universal bike thread — confirm 0.8mm pitch before threading into carbon or alloy bosses.
Buy these screws at TechSpare Warehouse
In stock and shipped from South Carolina. Our black screws are Phillips wafer head (low profile); match the head style and length to the original before you order.
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M5 x 10mm Black Wafer Head Bike Fender & Rack Screws for Tern MTR Fenders, Blackburn EX-1 Rack, ENVO Stax & René Herse Fender Set – 10-Pack Replacement
$5.99Choose size -
M5 x 10mm Black Wafer Head Folding Mechanism Screws for GOTRAX GXL V2, Rival, XR Ultra & XR Elite – 10-Pack Replacement
$5.99Choose size -
M5 x 12mm Black Wafer Head Cut-off Saw Screws for STIHL TS400 Cut-off Saw (replaces IS-M5x12 9022 341 0960) – 10-Pack Replacement
$5.99Choose size -
M5 x 12mm Black Wafer Head Generator Cover Screws for Honda EM, EB, EG Generators & EU3200i (replaces 90102-Z21-000) – 10-Pack Replacement
$5.99Choose size
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Devices whose records share a thread with 2020 extrusion T-nuts (standard), closest length match first.
- Voron 2.4 frame corner brackets also M5 × 10–20 mm
- Voron 2.4 3D printer also M5 × 10 mm
- Husqvarna Automower 305 / 308 robotic mower also M5 × 12 mm
- Prusa frame-to-extrusion joints also M5 × 12–16 mm
- Carbide3D Shapeoko 5 Pro CNC router also M5 × 10 mm
- NEMA 23 stepper motor face also M5 × 8–16 mm
- X-Carve / Shapeoko-style OpenBuilds clone kits also M5 × 10–16 mm
- CNC router spindle clamp also M5 × 16–20 mm
Questions about 2020 extrusion T-nuts (standard) screws
- What size screw does 2020 extrusion T-nuts (standard) use?
- M5 × 8–20 mm for the most common structural T-nut for 2020 framing.
- How long are the screws in 2020 extrusion T-nuts (standard)?
- The records range from 8 to 20 mm depending on the position, so match each screw to its own hole.
- What is the thread pitch of an M5 screw?
- 0.8 mm (coarse), which is the standard pitch for M5 machine screws; a 0.5 mm fine pitch exists but is uncommon. The tap drill is 4.2 mm and the normal clearance hole is 5.5 mm.
- What screwdriver do I need for 2020 extrusion T-nuts (standard)?
- The sources do not name the drive. For M5, Phillips heads normally take PH2 and Torx heads T25; socket heads take a 4 mm hex key.
- Can I use an imperial screw instead of M5?
- No. Imperial look-alike: #10-32 (4.83 mm) — the other common rack thread; check before mixing. Use a true M5 screw so it does not cross-thread or strip the hole.