Backscatter FLIP3.1 underwater flip-frame retaining screw screw size
M2.5 · 10 mm long
If you are replacing a screw on Backscatter FLIP3.1 underwater flip-frame retaining screw, the thread is M2.5, 10 mm long.
Where it is used: screw kit listing: one M2.5 x 10mm frame screw.
This entry is marked confirmed and comes from backscatter.com.
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.
Backscatter FLIP3.1 underwater flip-frame retaining screw 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 | 10 mm | 0.45 mm | not stated | not stated | Screw kit listing: one M2.5 x 10mm frame screw | Confirmed |
Fitment records and sources
Screw kit listing: one M2.5 x 10mm frame screw
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
How to check the screw before you buy
- Take one original screw out first and measure it before ordering; the record above tells you the thread, the original screw tells you the exact length and head.
- 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 record states 10 mm. Going longer risks bottoming out or touching parts behind the hole; going shorter loses thread engagement.
- 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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M2.5 x 10mm Phillips Wafer Head Screw for Turntable Cartridge Headshell Mount - Pack of 50 Black
$5.99 -
M2.5 x 10mm Phillips Wafer Head Screw for ASUS TUF Gaming A15/F15 Laptop Repair - Single Replacement Black
$0.10 each · min. 50
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M2.5 x 10mm Phillips Wafer Head Screw for Laptop Bottom Cover Replacement - Single Replacement Black
$0.10 each · min. 50
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Devices whose records share a thread with Backscatter FLIP3.1 underwater flip-frame retaining screw, closest length match first.
- Motorola APX 5000 / APX 6000 portable radio also M2.5 × 10 mm
- Raspberry Pi HAT stacking (Pololu / Adafruit) also M2.5 × 10 mm
- Raspberry Pi 3B / 4B / 5 / Zero 2 standoff kits also M2.5 × 10 mm
- Acer Aspire 3690 also M2.5 × 10 mm
- E-flite Gee Bee R-2 aileron servo cover also M2.5 × 10 mm
- HP ProBook 4320s also M2.5 × 10 mm
- Acer TravelMate 2450 also M2.5 × 10 mm
- Acer Aspire 5930Z also M2.5 × 10 mm
Questions about Backscatter FLIP3.1 underwater flip-frame retaining screw screws
- What size screw does Backscatter FLIP3.1 underwater flip-frame retaining screw use?
- M2.5 × 10 mm for screw kit listing: one M2.5 x 10mm frame screw.
- How long are the screws in Backscatter FLIP3.1 underwater flip-frame retaining screw?
- The record gives 10 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
- 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 Backscatter FLIP3.1 underwater flip-frame retaining screw?
- 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 Backscatter FLIP3.1 underwater flip-frame retaining screw?
- TechSpareWarehouse (our own store) lists M2.5 x 10mm, which matches the length in the records above.