Wurth Elektronik WA-SMSI SMT steel spacer screw size
M3 · 16 mm long
If you are replacing a screw on Wurth Elektronik WA-SMSI SMT steel spacer, the thread is M3, 16 mm long.
The record covers SMT PCB standoff for mounting boards to housings or other boards.
This entry is marked confirmed and comes from we-online.com WA-SMSI product page.
For reference, M3 is 3 mm across the threads at 0.5 mm pitch. The imperial size people confuse it with: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3.
Wurth Elektronik WA-SMSI SMT steel spacer 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 |
|---|---|---|---|---|---|---|
| M3 | 16 mm | 0.5 mm | not stated | not stated | SMT PCB standoff for mounting boards to housings or other boards | Confirmed |
Fitment records and sources
SMT PCB standoff for mounting boards to housings or other boards
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
Source: we-online.com WA-SMSI product page
How to check the screw before you buy
- Board standoffs and enclosure bosses set the usable length: the screw should clamp the board without bottoming in the standoff.
- Diameter: across the threads an M3 screw measures about 3 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 0.5 mm from one thread crest to the next (20 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 record states 16 mm. Going longer risks bottoming out or touching parts behind the hole; going shorter loses thread engagement.
- Driver: the source does not name the drive. Standard M3 heads take PH1 for Phillips and T10 for Torx, and a 2.5 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 M3 is about 80-130 N·cm into metal threads and 35-60 N·cm into plastic bosses; snug it up and stop.
Common mix-ups with M3
- Intel's ATX and microATX specs never state a metric standoff thread; PC motherboard standoffs are usually imperial 6-32, and PC fan screws are commonly 6-32 self-tapping.
- Motherboard screws must not poke past the standoff and touch traces on the back of the board.
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Devices whose records share a thread with Wurth Elektronik WA-SMSI SMT steel spacer, closest length match first.
- Wurth Elektronik WA-SSTIE steel spacer stud also M3 × 16 mm
- ISO 7380 button head, small assemblies also M3 × 16 mm
- Wurth Elektronik WA-SPAIE plastic spacer stud also M3 × 16 mm
- Creality Ender 3 (non-frame parts) also M3 × 16 mm
- Wurth Elektronik WA-HEX hexagonal lock screw also M3 × 16 mm
- Surgical instrument tray racks also M3 × 16 mm
- Keystone metric hex PCB standoff also M3 × 16 mm
- cab Applicator A3200 print-and-apply labeling system (packaging line hardware) also M3 × 16 mm
Questions about Wurth Elektronik WA-SMSI SMT steel spacer screws
- What size screw does Wurth Elektronik WA-SMSI SMT steel spacer use?
- M3 × 16 mm for SMT PCB standoff for mounting boards to housings or other boards.
- How long are the screws in Wurth Elektronik WA-SMSI SMT steel spacer?
- The record gives 16 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
- What is the thread pitch of an M3 screw?
- 0.5 mm (coarse), which is the standard pitch for M3 machine screws; a 0.35 mm fine pitch exists but is uncommon. The tap drill is 2.5 mm and the normal clearance hole is 3.4 mm.
- What screwdriver do I need for Wurth Elektronik WA-SMSI SMT steel spacer?
- The sources do not name the drive. For M3, Phillips heads normally take PH1 and Torx heads T10; socket heads take a 2.5 mm hex key.
- Can I use an imperial screw instead of M3?
- No. Imperial look-alike: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3. Use a true M3 screw so it does not cross-thread or strip the hole.