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HP Elite mt645 G7 Mobile Thin Client screw size

M1.6 / M2 / M2.5 · 2 to 4 mm long

If you are replacing a screw on HP Elite mt645 G7 Mobile Thin Client, the thread is M1.6, M2 and M2.5 in lengths from 2 to 4 mm.

There are 14 separate fitment records for it, including touchpad (qty 2, Phillips) (M1.6), bracket (qty 4, Phillips) (M2) and speaker (qty 1, Phillips) (M2), plus 11 more in the table below.

Head and drive, as the sources state them: Phillips drive.

14 of the 14 records are marked confirmed, drawn from 1 source (kaas.hpcloud.hp.com).

An M1.6 screw is 1.6 mm in diameter with a 0.35 mm pitch, tapped with a 1.25 mm drill; imperial look-alike: #1-72 UNF (1.85 mm) is larger; there is no true imperial equivalent.

HP Elite mt645 G7 Mobile Thin Client 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.

ThreadLengthPitchHeadDriveWhere it goesStatus
M1.62 mm0.35 mmnot statedPhillipsTouchpad (qty 2, Phillips)Confirmed
M22 mm0.4 mmnot statedPhillipsBracket (qty 4, Phillips)Confirmed
M22 mm0.4 mmnot statedPhillipsSpeaker (qty 1, Phillips)Confirmed
M22 mm0.4 mmnot statedPhillipsTouchpad (qty 4, Phillips)Confirmed
M22.5 mm0.4 mmnot statedPhillipsPower button (qty 1, Phillips)Confirmed
M22.5 mm0.4 mmnot statedPhillipsSSD (qty 1, Phillips)Confirmed
M22.5 mm0.4 mmnot statedPhillipsSystem board (qty 2, Phillips)Confirmed
M22.5 mm0.4 mmnot statedPhillipsWireless card (qty 1, Phillips)Confirmed
M24 mm0.4 mmnot statedPhillipsI/O board (qty 3, Phillips)Confirmed
M24 mm0.4 mmnot statedPhillipsBattery (qty 6, Phillips)Confirmed
M2.52.5 mm0.45 mmnot statedPhillipsHinge (qty 2, Phillips)Confirmed
M2.54 mm0.45 mmnot statedPhillipsDisplay (qty 5, Phillips)Confirmed
M2.54 mm0.45 mmnot statedPhillipsHinge (qty 3, Phillips)Confirmed
M2.54 mm0.45 mmnot statedPhillipsSystem board (qty 3, Phillips)Confirmed

Fitment records and sources

M1.62 mmconfirmed

Touchpad (qty 2, Phillips)

pitch 0.35 mm · tap 1.25 mm · clearance 1.8 mm · PH00 / Torx T4–T5

M22 mmconfirmed

Bracket (qty 4, Phillips)

pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6

M22 mmconfirmed

Speaker (qty 1, Phillips)

pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6

M22 mmconfirmed

Touchpad (qty 4, Phillips)

pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6

M22.5 mmconfirmed

Power button (qty 1, Phillips)

pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6

M22.5 mmconfirmed

SSD (qty 1, Phillips)

pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6

M22.5 mmconfirmed

System board (qty 2, Phillips)

pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6

M22.5 mmconfirmed

Wireless card (qty 1, Phillips)

pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6

M24 mmconfirmed

I/O board (qty 3, Phillips)

pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6

M24 mmconfirmed

Battery (qty 6, Phillips)

pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6

M2.52.5 mmconfirmed

Hinge (qty 2, Phillips)

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

M2.54 mmconfirmed

Display (qty 5, Phillips)

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

M2.54 mmconfirmed

Hinge (qty 3, Phillips)

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

M2.54 mmconfirmed

System board (qty 3, Phillips)

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

How to check the screw before you buy

  1. Laptop covers and brackets often mix two or three lengths of the same thread, so lay the screws out in the order they came out (a magnetic mat or a sheet of paper with the hole pattern drawn on it works).
  2. Diameter: across the threads an M1.6 screw measures about 1.6 mm with calipers (usually a hair under). This device also uses M2 / M2.5, so measure each screw rather than assuming they match.
  3. Pitch: 0.35 mm from one thread crest to the next (28.57 crests per centimetre). A thread pitch gauge or the pitch-gauge tool settles it in seconds.
  4. Length: measure from under the head to the tip for pan, button, wafer and cap heads; countersunk (flat) heads are measured overall.
  5. The records span 2–4 mm, which means different positions take different lengths — match each hole to its own screw.
  6. Driver: the source names a Phillips drive. For comparison, standard M1.6 heads take PH00 (Phillips) or T4–T5 (Torx), or a 1.5 mm hex key.
  7. Tightening: no device-specific torque is published in these records. The site's general figure for M1.6 is about 12-20 N·cm into metal threads and 6-10 N·cm into plastic bosses; snug it up and stop.

Common mix-ups with M1.6 / M2 / M2.5

  • Headphone hinge screw sizes are usually quoted from screwdriver bit size, not an actual thread spec - measure before buying.
  • The standard M.2 SSD screw is M2 x 3mm, but some laptops and handhelds use non-standard lengths or head shapes.
  • M2.5 pitch is 0.45mm vs M3's 0.5mm and M2's 0.4mm — forcing the wrong one strips plastic bosses instantly.

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 HP Elite mt645 G7 Mobile Thin Client, closest length match first.

Questions about HP Elite mt645 G7 Mobile Thin Client screws

What size screw does HP Elite mt645 G7 Mobile Thin Client use?
M1.6 × 2 mm for touchpad (qty 2, Phillips); M2 × 2 mm for bracket (qty 4, Phillips); M2 × 2 mm for speaker (qty 1, Phillips); M2 × 2 mm for touchpad (qty 4, Phillips); M2 × 2.5 mm for power button (qty 1, Phillips); M2 × 2.5 mm for SSD (qty 1, Phillips); M2 × 2.5 mm for system board (qty 2, Phillips); M2 × 2.5 mm for wireless card (qty 1, Phillips); M2 × 4 mm for I/O board (qty 3, Phillips); M2 × 4 mm for battery (qty 6, Phillips); M2.5 × 2.5 mm for hinge (qty 2, Phillips); M2.5 × 4 mm for display (qty 5, Phillips); M2.5 × 4 mm for hinge (qty 3, Phillips); M2.5 × 4 mm for system board (qty 3, Phillips).
How long are the screws in HP Elite mt645 G7 Mobile Thin Client?
The records range from 2 to 4 mm depending on the position, so match each screw to its own hole.
What is the thread pitch of an M1.6 screw?
0.35 mm (coarse), which is the standard pitch for M1.6 machine screws; a 0.2 mm fine pitch exists but is uncommon. The tap drill is 1.25 mm and the normal clearance hole is 1.8 mm.
What screwdriver do I need for HP Elite mt645 G7 Mobile Thin Client?
The source lists a Phillips drive. Standard M1.6 heads otherwise take PH00 (Phillips) or T4–T5 (Torx), or a 1.5 mm hex key.
Can I use an imperial screw instead of M1.6?
No. Imperial look-alike: #1-72 UNF (1.85 mm) is larger; there is no true imperial equivalent. Use a true M1.6 screw so it does not cross-thread or strip the hole.
Where can I buy replacement screws for HP Elite mt645 G7 Mobile Thin Client?
TechSpareWarehouse (our own store) lists M2 x 2mm, M2 x 2.5mm and M2 x 4mm, which match lengths in the records above.