Watch case screw screw size
M1.6 · length not stated in the sources
If you are replacing a screw on Watch case screw, the thread is M1.6. None of the sources we found gives an exact length, so measure the original before you order.
The record covers customized M1.6 stainless steel small mini torx electronics screw for watch.
Head and drive, as the source states them: Torx drive.
This entry is marked confirmed and comes from screwsmicro.com.
For reference, M1.6 is 1.6 mm across the threads at 0.35 mm pitch. The imperial size people confuse it with: #1-72 UNF (1.85 mm) is larger; there is no true imperial equivalent.
Watch case screw 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 |
|---|---|---|---|---|---|---|
| M1.6 | not stated | 0.35 mm | not stated | Torx | Customized M1.6 stainless steel small mini torx electronics screw for watchstainless | Confirmed |
Fitment records and sources
Customized M1.6 stainless steel small mini torx electronics screw for watch
pitch 0.35 mm · tap 1.25 mm · clearance 1.8 mm · PH00 / Torx T4–T5
How to check the screw before you buy
- Phone and wearable screws are tiny and often differ by fractions of a millimetre between positions; keep each one next to the hole it came from.
- Diameter: across the threads an M1.6 screw measures about 1.6 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- 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.
- Length: measure from under the head to the tip for pan, button, wafer and cap heads; countersunk (flat) heads are measured overall.
- Driver: the source names a Torx drive. For comparison, standard M1.6 heads take PH00 (Phillips) or T4–T5 (Torx), or a 1.5 mm hex key.
- 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.
More in Phones, Tablets & Wearables
The same screw also fits
Devices whose records share a thread with Watch case screw, closest length match first.
- Steam Deck (LCD) Type 5 fastener also M1.6
- Steam Deck (LCD) Type 7 fastener also M1.6
- iPad Mini 5 internal brackets also M1.6
- Steam Deck inner backplate screws also M1.6
- Valve Steam Deck (LCD) also M1.6
- Compact smart sensor PCBs also M1.6
- iPad Pro 11-inch internal brackets also M1.6
- Watch bracelets & casebacks also M1.6
Questions about Watch case screw screws
- What size screw does Watch case screw use?
- M1.6 for customized M1.6 stainless steel small mini torx electronics screw for watch.
- How long are the screws in Watch case screw?
- None of the sources states a length. Remove one screw and measure it from under the head to the tip (overall for a countersunk head).
- 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 Watch case screw?
- The source lists a Torx 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.