What size screw does Dive computer strap / bezel use?

M2.5 × 3–6 mm for bezel ring and strap lugs on wrist dive computers.

How long are the screws in Dive computer strap / bezel?

The records range from 3 to 6 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 Dive computer strap / bezel?

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 Dive computer strap / bezel?

TechSpareWarehouse (our own store) lists M2.5 x 3mm, M2.5 x 4mm and M2.5 x 5mm, which match lengths in the records above.

Dive computer strap / bezel screw size

M2.5 · 3 to 6 mm long

Dive computer strap / bezel takes M2.5 metric screws in lengths from 3 to 6 mm.

The record covers bezel ring and strap lugs on wrist dive computers.

This entry is marked reported and comes from alibaba.com.

M2.5 means a 2.5 mm nominal diameter with a 0.45 mm thread pitch. 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.

Dive computer strap / bezel 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	3–6 mm	0.45 mm	not stated	not stated	bezel ring and strap lugs on wrist dive computers	Reported

Fitment records and sources

M2.53-6mmreported

bezel ring and strap lugs on wrist dive computers

pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8

Source

How to check the screw before you buy

Where the manufacturer publishes a torque value, use a torque driver rather than feel.
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 3–6 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.

Pitch gauge · Screw size finder · Torque guide

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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The same screw also fits

Devices whose records share a thread with Dive computer strap / bezel, closest length match first.

Audio MusiKraft cartridge mounting screw kit also M2.5 × 3–6 mm
Turntable cartridge mounting kit (retail) also M2.5 × 3–6 mm
Audio MusiKraft cartridge/headshell mounting kit also M2.5 × 3–6 mm
Marine compass bezel also M2.5 × 5–6 mm
Phono cartridge headshell mounting screws (Tonar universal set) also M2.5 × 3–6 mm
Tonar cartridge screw set for phono cartridges also M2.5 × 3–6 mm
Turntable headshell / phono cartridge mounting screws also M2.5 × 3–6 mm
Ortofon 2M cartridge also M2.5 × 5–6 mm

Questions about Dive computer strap / bezel screws

What size screw does Dive computer strap / bezel use?: M2.5 × 3–6 mm for bezel ring and strap lugs on wrist dive computers.
How long are the screws in Dive computer strap / bezel?: The records range from 3 to 6 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 Dive computer strap / bezel?: 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 Dive computer strap / bezel?: TechSpareWarehouse (our own store) lists M2.5 x 3mm, M2.5 x 4mm and M2.5 x 5mm, which match lengths in the records above.

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