Industry
Micro fasteners for consumer devices, boards and precision modules
Electronics Manufacturing Why it matters
Consumer electronics is where micro fasteners are pushed hardest. The screws are small enough that a 0.02 mm burr matters, visible enough that a colour mismatch is a defect, and produced in volumes where a single process drift becomes a million rejected parts. A phone may use 20–30 screws, a notebook 40–60, and each position has its own head height, drive and finish requirement.
We build to electronics conventions: PPAP documentation, first article inspection reports, Cpk on critical dimensions, cleanroom-compatible packing and full material declarations. The same plant that forges the screw also runs the PVD line and the optical sorter, so finish and dimensional control are not handed off between suppliers.
M0.5
Smallest diameter produced
±0.03
Head diameter tolerance (mm)
100%
Optical sorting before packing
1 day
Typical prototype lead time
Field problems
These are the failure modes we see most often, and the engineering response that addresses each one. Problems are stated as they appear on the line, not as they appear in a textbook.
| Problem observed | Engineering response |
|---|---|
| Screws drop or jam in automated drivers because the head is not concentric to the shank. | Head-to-shank concentricity held within 0.03 mm, verified by vision on every production lot. |
| Cosmetic black screws show colour variation between lots on a visible external surface. | DLC or matte black PVD applied in-house against a retained master chip, with spectrophotometer verification per batch. |
| Drive recess deforms after repeated automated engagement, causing cam-out and line stoppage. | Punch geometry dressed on a fixed interval, recess depth gauged, optional TiCN coating for high-cycle lines. |
| Threadlocker applied at the line varies in volume and contaminates nearby optics. | Factory-applied nylon patch or encapsulated adhesive at a controlled axial position, eliminating line dispensing. |
| Incoming inspection finds mixed sizes in a reel, stopping the line. | 100% optical sorting by head diameter and length, with reel-level lot traceability. |
| A last-minute design change requires a new screw length before the next build. | In-house tooling and a one-day prototype cell for lengths and head variants within the existing diameter family. |
Specification basis
A starting specification, not a fixed menu. Most programmes adjust one or two of these after the first joint review.
Diameter
M0.5 – M3.0, with M1.0 – M1.6 the highest volume band
Length tolerance
±0.05 mm below 3 mm, ±0.10 mm above
Head tolerance
±0.03 mm diameter, ±0.02 mm height
Material
SUS304, SUS410, SWCH18A, brass, titanium
Finish
PVD black, nickel, zinc trivalent, passivation
Cleanliness
Degreased, no oil residue, cleanroom bagging available
Documentation
PPAP, FAI, material cert, RoHS / REACH
Packing
Reel, tray or bag, anti-static where required
Recommended products
Chosen for the tolerance, finish and locking requirements typical of the assemblies described above.
Micro Screws · M0.5 – M6
Precision machine screws from M0.5 to M6 with rolled Class 6g threads, tight head concentricity and clean drive recesses for automated driving.
Micro Screws · M0.8 – M6
Physical vapour deposition coatings that add 2–5 µm of hard ceramic film — for driver wear resistance, low friction and decorative black or gold finishes.
Micro Screws · M0.8 – M6
Screws with a factory-applied locking or sealing element, so the assembly line receives a ready-to-drive fastener with no liquid adhesive and no cure time.
Micro Screws · M0.6 – M4
Self-tapping micro screws from M0.6 to M4 with controlled point geometry, engineered to form clean threads in engineering plastics without cracking the boss.
Design notes
These decisions are cheap at concept stage and expensive after tooling is cut.
01
In a stacked camera or display module the head height often sets the stack. Low-profile and wafer heads can recover 0.2–0.3 mm, which is frequently more valuable than reducing the screw diameter.
02
Black is not a specification. DLC, matte PVD, black oxide and black zinc look different and age differently. Name the process and, where the part is visible, the gloss level.
03
A Torx drive costs more per screw but reduces cam-out and bit replacement. On a high-volume line the trade often pays back within a month.
04
If a device may be opened in service, a nylon patch allows re-use. Encapsulated adhesive does not. Decide this before the screw is released.
Joint review
A drawing gives us geometry. The mating material, the service cycles and the cleaning chemistry decide whether the joint works. Send all three and we will review the whole stack.
Questions
Answers to the questions that come up most in this industry.
Related industries
The same fastener discipline applies across these industries, with different documentation and validation requirements.
Industry
The smallest fasteners we make: M0.5–M1.6 screws, micro standoffs and inserts for phone modules, earbuds, smartwatches and AR glasses.
Industry
Standoffs, board screws, captive panel fasteners and high-strength screws for server chassis, GPU cards and data centre equipment.
Industry
Our second focus industry: M1–M4 high-strength fasteners for dexterous hands, finger linkages and tendon-driven mechanisms, where fasteners see millions of cycles.
Industry
Automotive-grade micro fasteners with PPAP, traceability and vibration validation for control units, sensor housings and battery management systems.
From a single prototype joint to a PPAP production launch, the same team reviews the drawing and the assembly context.