PW-Sat2 CubeSat secondary structure and panels screw size
M2.5 · 4 to 8 mm long
The screws used on PW-Sat2 CubeSat secondary structure and panels are M2.5 in lengths from 4 to 8 mm.
It is listed for M2.5 x 4mm solar panel brackets, M2.5 x 6mm sun sensor mount, M2.5 x 8mm secondary structure to X frames.
This entry is marked confirmed and comes from pw-sat.pl.
For reference, M2.5 is 2.5 mm across the threads at 0.45 mm pitch. The imperial size people confuse it with: #3-48 / #4-40 (2.51 / 2.84 mm) — #4-40 is the common US stand-in and it will NOT thread in.
PW-Sat2 CubeSat secondary structure and panels 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 |
|---|---|---|---|---|---|---|
| M2.5 | 4–8 mm | 0.45 mm | not stated | not stated | M2.5 x 4mm solar panel brackets, M2.5 x 6mm sun sensor mount, M2.5 x 8mm secondary structure to X frames | Confirmed |
Fitment records and sources
M2.5 x 4mm solar panel brackets, M2.5 x 6mm sun sensor mount, M2.5 x 8mm secondary structure to X frames
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
How to check the screw before you buy
- Board standoffs and enclosure bosses set the usable length: the screw should clamp the board without bottoming in the standoff.
- Diameter: across the threads an M2.5 screw measures about 2.5 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 0.45 mm from one thread crest to the next (22.22 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 4–8 mm, which means different positions take different lengths — match each hole to its own screw.
- Driver: the source does not name the drive. Standard M2.5 heads take PH1 for Phillips and T8 for Torx, and a 2 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 M2.5 is about 45-70 N·cm into metal threads and 20-35 N·cm into plastic bosses; snug it up and stop.
Common mix-ups with M2.5
- M2.5 pitch is 0.45mm vs M3's 0.5mm and M2's 0.4mm — forcing the wrong one strips plastic bosses instantly.
- M2.5 and M3 look the same to the naked eye — you need calipers on the shank to tell them apart.
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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Devices whose records share a thread with PW-Sat2 CubeSat secondary structure and panels, closest length match first.
- HP Pavilion also M2.5 × 4–6 mm
- HP EliteBook 840 G2 / 740 G2 / ZBook 14 G2 also M2.5 × 4–5 mm
- HP EliteBook 725 G3 also M2.5 × 4–5 mm
- Keystone Electronics metric nylon standoff also M2.5 × 4–5 mm
- Eurorack rails (older Doepfer variant) also M2.5 × 6 mm
- Lenovo IdeaPad also M2.5 × 4–6 mm
- Wurth Elektronik WA-SPAIE plastic spacer stud also M2.5 × 5–8 mm
- Clear-Com panel PSU module also M2.5 × 5 mm
Questions about PW-Sat2 CubeSat secondary structure and panels screws
- What size screw does PW-Sat2 CubeSat secondary structure and panels use?
- M2.5 × 4–8 mm for M2.5 x 4mm solar panel brackets, M2.5 x 6mm sun sensor mount, M2.5 x 8mm secondary structure to X frames.
- How long are the screws in PW-Sat2 CubeSat secondary structure and panels?
- The records range from 4 to 8 mm depending on the position, so match each screw to its own hole.
- What is the thread pitch of an M2.5 screw?
- 0.45 mm (coarse), which is the standard pitch for M2.5 machine screws; a 0.35 mm fine pitch exists but is uncommon. The tap drill is 2.05 mm and the normal clearance hole is 2.9 mm.
- What screwdriver do I need for PW-Sat2 CubeSat secondary structure and panels?
- The sources do not name the drive. For M2.5, Phillips heads normally take PH1 and Torx heads T8; socket heads take a 2 mm hex key.
- Can I use an imperial screw instead of M2.5?
- No. Imperial look-alike: #3-48 / #4-40 (2.51 / 2.84 mm) — #4-40 is the common US stand-in and it will NOT thread in. Use a true M2.5 screw so it does not cross-thread or strip the hole.
- Where can I buy replacement screws for PW-Sat2 CubeSat secondary structure and panels?
- TechSpareWarehouse (our own store) lists M2.5 x 4mm, M2.5 x 5mm and M2.5 x 6mm, which match lengths in the records above.