MSA AirHawk II SCBA screw size
M2.5 · 16 mm long
Our records put MSA AirHawk II SCBA on M2.5 screws, 16 mm long.
It is listed for assembly machine screw, stainless.
This entry is marked confirmed and comes from msagasmonitors.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.
MSA AirHawk II SCBA 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 | 16 mm | 0.45 mm | not stated | not stated | assembly machine screw, stainlessstainless | Confirmed |
Fitment records and sources
assembly machine screw, stainless
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
How to check the screw before you buy
- Check the strength class stamped on the head (8.8, 10.9, A2-70) and replace like for like.
- 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 16 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.
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Devices whose records share a thread with MSA AirHawk II SCBA, closest length match first.
- Wurth Elektronik WA-SPAIE plastic spacer stud also M2.5 × 16 mm
- Lenovo ThinkPad A31P also M2.5 × 16 mm
- Toshiba Satellite Pro M10 also M2.5 × 16 mm
- Lenovo ThinkPad A30p also M2.5 × 16 mm
- Toshiba Satellite 2405 also M2.5 × 16 mm
- DIN 912 socket-head cap screw also M2.5 × 16 mm
- Lenovo ThinkPad 600 also M2.5 × 16 mm
- Toshiba Satellite 5100 also M2.5 × 16 mm
Questions about MSA AirHawk II SCBA screws
- What size screw does MSA AirHawk II SCBA use?
- M2.5 × 16 mm for assembly machine screw, stainless.
- How long are the screws in MSA AirHawk II SCBA?
- The record gives 16 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 MSA AirHawk II SCBA?
- 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.