Dell Precision 3591 screw size
M2 / M2.5 · 2 to 8.4 mm long
The screws used on Dell Precision 3591 are M2 and M2.5 in lengths from 2 to 8.4 mm.
There are 16 separate fitment records for it, including card reader (qty 2) (M2), keyboard (qty 21) (M2) and power button (qty 2) (M2), plus 13 more in the table below.
16 of the 16 records are marked confirmed, drawn from 1 source (dell.com).
For reference, M2 is 2 mm across the threads at 0.4 mm pitch. The imperial size people confuse it with: #2-56 UNC (2.18 mm) is close but not interchangeable.
Dell Precision 3591 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 | 2 mm | 0.4 mm | not stated | not stated | Card reader (qty 2) | Confirmed |
| M2 | 2 mm | 0.4 mm | not stated | not stated | Keyboard (qty 21) | Confirmed |
| M2 | 2.5 mm | 0.4 mm | not stated | not stated | Power button (qty 2) | Confirmed |
| M2 | 2.5 mm | 0.4 mm | not stated | not stated | Touchpad (qty 5) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Battery (qty 4, captive)captive | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Chassis/frame (qty 12) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Display (qty 2) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | SSD (qty 2) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | System board (qty 3) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Unspecified (qty 2) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Wireless card (qty 2) | Confirmed |
| M2 | 4 mm | 0.4 mm | not stated | not stated | Fan (qty 2) | Confirmed |
| M2 | 4 mm | 0.4 mm | not stated | not stated | USB-C board (qty 3) | Confirmed |
| M2.5 | 3.5 mm | 0.45 mm | not stated | not stated | Display (qty 4) | Confirmed |
| M2.5 | 3.5 mm | 0.45 mm | not stated | not stated | Hinge (qty 2) | Confirmed |
| M2.5 | 8.4 mm | 0.45 mm | not stated | not stated | Base cover (qty 8, captive)captive | Confirmed |
Fitment records and sources
Card reader (qty 2)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Keyboard (qty 21)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Power button (qty 2)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Touchpad (qty 5)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Battery (qty 4, captive)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Chassis/frame (qty 12)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Display (qty 2)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
SSD (qty 2)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
System board (qty 3)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Unspecified (qty 2)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Wireless card (qty 2)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Fan (qty 2)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
USB-C board (qty 3)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Display (qty 4)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Hinge (qty 2)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Base cover (qty 8, captive)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
How to check the screw before you buy
- 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).
- Diameter: across the threads an M2 screw measures about 2 mm with calipers (usually a hair under). This device also uses M2.5, so measure each screw rather than assuming they match.
- Pitch: 0.4 mm from one thread crest to the next (25 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 2–8.4 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 heads take PH0 for Phillips and T6 for Torx, and a 1.5 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 is about 25-40 N·cm into metal threads and 12-20 N·cm into plastic bosses; snug it up and stop.
Common mix-ups with M2 / M2.5
- M.2 SSD mounting screws (M2 x 3mm) are frequently mislabeled generically as 'M.2 screws' which can be confused with the M2 metric thread designation — they do coincide numerically here but are conceptually distinct (M.2 = card format, M2 = thread size).
- The standard M.2 SSD screw is M2 x 3mm, but some laptops and handhelds use non-standard lengths or head shapes.
- Dell/HP/Lenovo manuals often list screws only by torque or head shape, so community teardowns are needed for diameter.
- 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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ASUS ROG Strix G17 G713 Replacement Screws Sold Individually – M1.6 x 3mm, M2 x 2.5mm, M2 x 3mm, M2.5 x 6mm Phillips Wafer Head, Black
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More in Laptops & PCs
The same screw also fits
Devices whose records share a thread with Dell Precision 3591, closest length match first.
- Dell G7 15 7588 also M2 × 2 mm
- Lenovo ideapad 320R-17IKB also M2 × 3 mm
- Dell Alienware M.2 SSD and heatsink also M2 × 3 mm
- Lenovo ThinkPad X240 also M2 × 3 mm
- Lenovo ideapad 310 Touch-15ISK also M2 × 3 mm
- HP EliteBook x360 830 G8 also M2 × 2 mm
- HP Pavilion ZV6000 also M2 × 3 mm
- Lenovo IdeaPad Z580 also M2 × 2.5 mm
Questions about Dell Precision 3591 screws
- What size screw does Dell Precision 3591 use?
- M2 × 2 mm for card reader (qty 2); M2 × 2 mm for keyboard (qty 21); M2 × 2.5 mm for power button (qty 2); M2 × 2.5 mm for touchpad (qty 5); M2 × 3 mm for battery (qty 4, captive); M2 × 3 mm for chassis/frame (qty 12); M2 × 3 mm for display (qty 2); M2 × 3 mm for SSD (qty 2); M2 × 3 mm for system board (qty 3); M2 × 3 mm for unspecified (qty 2); M2 × 3 mm for wireless card (qty 2); M2 × 4 mm for fan (qty 2); M2 × 4 mm for USB-C board (qty 3); M2.5 × 3.5 mm for display (qty 4); M2.5 × 3.5 mm for hinge (qty 2); M2.5 × 8.4 mm for base cover (qty 8, captive).
- How long are the screws in Dell Precision 3591?
- The records range from 2 to 8.4 mm depending on the position, so match each screw to its own hole.
- What is the thread pitch of an M2 screw?
- 0.4 mm (coarse), which is the standard pitch for M2 machine screws; a 0.25 mm fine pitch exists but is uncommon. The tap drill is 1.6 mm and the normal clearance hole is 2.4 mm.
- What screwdriver do I need for Dell Precision 3591?
- The sources do not name the drive. For M2, Phillips heads normally take PH0 and Torx heads T6; socket heads take a 1.5 mm hex key.
- Can I use an imperial screw instead of M2?
- No. Imperial look-alike: #2-56 UNC (2.18 mm) is close but not interchangeable. Use a true M2 screw so it does not cross-thread or strip the hole.
- Where can I buy replacement screws for Dell Precision 3591?
- TechSpareWarehouse (our own store) lists M2 x 2mm, M2 x 2.5mm and M2 x 3mm, which match lengths in the records above.