iPhone Air internal 'Main Screw' (genuine OEM teardown part) screw size
M1.4 · 2.55 mm long
iPhone Air internal 'Main Screw' (genuine OEM teardown part) takes M1.4 metric screws, 2.55 mm long.
Where it is used: repair vendor lists genuine OEM screw as 'M1.4 × 2.55 L × 2.4 D × 0.33 T' for iPhone Air.
This entry is marked confirmed and comes from mycctrepairs.com.
For reference, M1.4 is 1.4 mm across the threads at 0.3 mm pitch. The imperial size people confuse it with: #0-80 UNF (1.52 mm) — close in diameter, different pitch, do not mix.
iPhone Air internal 'Main Screw' (genuine OEM teardown part) 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 |
|---|---|---|---|---|---|---|
| M1.4 | 2.55 mm | 0.3 mm | not stated | not stated | Repair vendor lists genuine OEM screw as 'M1.4 × 2.55 L × 2.4 D × 0.33 T' for iPhone Air | Confirmed |
Fitment records and sources
Repair vendor lists genuine OEM screw as 'M1.4 × 2.55 L × 2.4 D × 0.33 T' for iPhone Air
pitch 0.3 mm · tap 1.1 mm · clearance 1.6 mm · PH000 / PH00 / Torx T2–T3
How to check the screw before you buy
- Over-long screws in phones are a known cause of damaged boards (Apple's 'long screw damage'), so never swap positions.
- Diameter: across the threads an M1.4 screw measures about 1.4 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 0.3 mm from one thread crest to the next (33.33 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 2.55 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 M1.4 heads take PH000 / PH00 for Phillips and T2–T3 for Torx, and a 1.3 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 M1.4 is about 8-12 N·cm into metal threads and 4-7 N·cm into plastic bosses; snug it up and stop.
Common mix-ups with M1.4
- iPhone-series OEM screws use both 'Main Screw' and 'Super Screw' names for M1.4 fasteners with different lengths per model/position — always match by dimensional code (L x D x T), not just model name.
- M1.4 is THE Samsung Galaxy internal screw across S, A, M and Note lines — but lengths run 2.3mm to 4mm+ and are not interchangeable between models.
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Devices whose records share a thread with iPhone Air internal 'Main Screw' (genuine OEM teardown part), closest length match first.
- Samsung Galaxy S23+ internal shields also M1.4 × 2.55 mm
- Google Pixel phones also M1.4 × 2.55 mm
- LG smartphones also M1.4 × 2.55 mm
- Google Pixel 7 motherboard also M1.4 × 2.55 mm
- Miniature precision instrument screws (NBK) also M1.4 × 2.55 mm
- OnePlus / Xiaomi flagship midframes also M1.4 × 2.55 mm
- Google Pixel 7 battery bracket also M1.4 × 2.55 mm
- Garmin smartwatch back cover also M1.4 × 2.55 mm
Questions about iPhone Air internal 'Main Screw' (genuine OEM teardown part) screws
- What size screw does iPhone Air internal 'Main Screw' (genuine OEM teardown part) use?
- M1.4 × 2.55 mm for repair vendor lists genuine OEM screw as 'M1.4 × 2.55 L × 2.4 D × 0.33 T' for iPhone Air.
- How long are the screws in iPhone Air internal 'Main Screw' (genuine OEM teardown part)?
- The record gives 2.55 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
- What is the thread pitch of an M1.4 screw?
- 0.3 mm (coarse), which is the standard pitch for M1.4 machine screws. The tap drill is 1.1 mm and the normal clearance hole is 1.6 mm.
- What screwdriver do I need for iPhone Air internal 'Main Screw' (genuine OEM teardown part)?
- The sources do not name the drive. For M1.4, Phillips heads normally take PH000 / PH00 and Torx heads T2–T3; socket heads take a 1.3 mm hex key.
- Can I use an imperial screw instead of M1.4?
- No. Imperial look-alike: #0-80 UNF (1.52 mm) — close in diameter, different pitch, do not mix. Use a true M1.4 screw so it does not cross-thread or strip the hole.