Lenovo ThinkPad E490s and S3 screw size
Lenovo ThinkPad E490s and S3 uses M2 / M2.5 screws. Details, length ranges and sources below.
internal FRU screw listed in the official Hardware Maintenance Manual screw tables — flat-head, 2.5mm long
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
wireless LAN card — flat-head screw, 2.5mm long (official Hardware Maintenance Manual screw table)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
I/O card — flat-head screw, 4mm long (official Hardware Maintenance Manual screw table)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
I/O card — flat-head screw, 2mm long (official Hardware Maintenance Manual screw table)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
internal FRU screw listed in the official Hardware Maintenance Manual screw tables — small-head, 4mm long
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
fingerprint reader card — flat-head screw, 2mm long (official Hardware Maintenance Manual screw table)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
internal FRU screw listed in the official Hardware Maintenance Manual screw tables — flat-head, 2mm long
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
system board — flat-head screw, 2.5mm long (official Hardware Maintenance Manual screw table)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
hinges — flat-head screw, 2.2mm long (official Hardware Maintenance Manual screw table)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
I/O card — flat-head screw, 5mm long (official Hardware Maintenance Manual screw table)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
system board — flat-head screw, 5mm long (official Hardware Maintenance Manual screw table)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Replacement screws for Lenovo ThinkPad E490s and S3
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- Buy on AmazonKits and single sizes, with reviews naming real devices
- Buy on eBayOEM screw sets and repair-parts sellers
- M2 screw assortment kitBoxed kit with several lengths — the cheapest way to cover one thread size
- M2 socket cap screwsISO 4762 / DIN 912 hex-drive, the engineering default
- M2 low profile / button headFor clearance-limited repairs and thin covers
- M2 standoffs & spacersPCB and board-mount hardware in the same thread
- M2 tap & drillFor cutting or chasing a damaged thread
- Precision driver setSmall threads need a properly fitting bit or you cam out and round the head
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