Product Manual · Micro Screws
Micro Screws Product Manual
Factory supply of high-precision micro screws — a complete selection across drive type, thread type, head style, material and surface finish, including installation methods and anti-loosening and thread-locking solutions for electronics, digital devices and precision instruments, with non-standard customization.
8 TypesAll drive types covered
4 TypesHead styles
10 TypesSurface finishes
PDFFull-range specification manual
Advantages
Consumer electronics precision screws combine micro-level accuracy, high strength and vibration resistance, non-magnetic low-interference operation and stable, reliable locking — a perfect fit for thinner, highly integrated products and automated assembly.
02
Screw installation process
Position and fix – drive – installation complete
How it works
- Rotating the screw converts torque into axial clamping force (preload is typically 70–80% of the breaking torque), and the thread engagement clamps the parts together to form a fastened joint.
03
Product features – drive types
Phillips
Torx (TORX)
Torx (TORX PLUS)
11-slot drive
Hex socket
Slotted
Tri-wing Y-type
Pozidriv
04
Thread types
Thread type
Machine thread (M) with thread adhesive | Self-tapping thread (B)
Application – machine thread
Machine thread: coarse or fine pitch, M0.6–M2. Must be used with a nut or a pre-tapped hole. Can be assembled and disassembled repeatedly with high clamping force and stable torque, without thread stripping, and offers high dimensional accuracy for precise positioning and reliable locking (electronic screws normally carry a pre-applied locking adhesive).
Typically used for phone mid-frames, metal brackets and metal back covers, mainboard fixing, heat-sink modules, shielding cans, hinges and camera modules — structural parts that are serviced and disassembled several times, paired with brass inserts or heat-staked nuts.
Application – self-tapping thread
Self-tapping thread (sharp point A, flat point B, coarse thread with large pitch): after a pilot hole is prepared the screw is driven directly into plastic or thin metal and cuts its own thread. Repeated disassembly is generally not recommended, as the thread strips easily. Self-tapping screws below M2 are normally made without a sharp point and from carbon steel with carburizing to raise surface hardness and wear resistance — fast to assemble and low in cost.
Typically used for plastic housings, battery covers, decorative parts, earbud charging cases, router shells and light-load plastic brackets inside small appliances — cosmetic parts and inserts that are rarely disassembled.
05
Head style
Pan head (C)
Small pan head (P)
Countersunk head (F)
06
Material
Consumer electronics screws are made of either carbon steel or stainless steel.
- Carbon steel: SWRCH10A, SWRCH18A, SWRCH22A;
- Stainless steel: SUS302HQ, SUS304, SUS316, SUS410 (stainless iron)
- Special alloy: titanium (TA2);
- Magnetism: low magnetism — SUS302HQ, SUS304, SUS316; non-magnetic — titanium (TA2).
- Strength: carbon steel and stainless iron (SUS410) can be hardened by heat treatment; stainless steel cannot be hardened by heat treatment.
07
Surface finishes
Common finishes include zinc plating, nickel plating, zinc-nickel alloy plating, PVD vacuum coating and stainless steel passivation, meeting professional requirements for corrosion protection, decorative appearance, electrical performance, hydrogen embrittlement control and retention of dimensional accuracy under different service conditions.
Trivalent color zinc
Blue-white zinc
Green zinc
Black zinc
Zinc-nickel, natural
Zinc-nickel, black
PVD vacuum coating
Nano coating
Baked enamel
08
Product applications
09
Machine screws overview
Anti-loosening machine screws resist vibration, engage the thread accurately and hold firmly without stripping or working loose, for long and reliable service in precision machinery.
Features and benefits
- Anti-loosening and vibration resistant: strong locking force, will not loosen or drop out under vibration and harsh conditions
- High-precision fit: mates perfectly with the female thread for excellent coaxiality and tight assembly
- Secure fixing: high locking strength, no stripping or slipping under load
- Standard sizing: standard metric head profiles, compliant with micro metric standards, highly interchangeable and easy to replace
- Space-saving and easy to install: compact bodies suit precision instruments and save internal installation space
- Durable and corrosion resistant: quality material resists rust and aging for a long service life
Applications
Fits the small hole patterns of precision instruments and saves installation space inside electronic devices.
Dimensional accuracy
- Size: M0.8–M2.0
- Head style: flat head (C)
- Drive: Phillips
- Material: stainless steel, carbon steel
- Surface treatment: passivation, nickel plating...
- Design point: optimize line-side assembly efficiency, keep wall thickness within specification and eliminate screw head breakage.
| Size (d) | Head diameter (a) | Head thickness (b) | Thread length (c) | Drive depth (q) | Chamfer (f) | Wall thickness (e) | Drive type |
|---|---|---|---|---|---|---|---|
| M0.8X0.2P | 1.30min | 0.30±0.05 | 0.9min | 0.15min | 0.10min | 0.08min | Phillips #0 |
| M1.0X0.20P | 1.7min | 0.25±0.05 | 1.2min | 0.20min | 0.10min | 0.1min | |
| M1.0X0.25P | 0.9min | ||||||
| M1.2X0.20P | 1.9min | 0.30±0.05 | 1.4min | 0.30min | 0.15min | 0.14min | |
| M1.2X0.25P | 1.1min | ||||||
| M1.4X0.20P | 2.1min | 0.35±0.05 | 1.7min | 0.40min | 0.20min | 0.23min | |
| M1.4X0.3P | 1.4min | ||||||
| M1.6X0.2P | 2.4min | 0.45±0.05 | 1.9min | 0.50min | 0.25min | ... | |
| M1.6X0.35P | 1.6min | ... | |||||
| M2.0X0.25P | 3.0min | 0.45±0.05 | 2.4min | 0.60min | 0.30min | ... | |
| M2.0X0.4P | 2.0min | ... |
10
Self-tapping screws overview
A self-tapping screw joint needs only a drilled or punched pilot hole in the workpiece, with no pre-formed thread in the hole. The screw can be driven directly into many materials — fast, time-saving installation with tight, firm engagement — and is widely used in furniture, appliances, electronics and decorative assembly.
Features and benefits
- Saves time and effort during installation
- Self-cutting thread for tight, firm fastening
- Broad compatibility: suitable for wood, plastic, thin sheet metal, boards and other materials
- High assembly efficiency, fewer process steps, lower labor and processing cost
- Firm fastening that resists loosening, with strong vibration resistance
- Compact and space-saving, ideal for precision assembly in appliances, electronics, furniture and decorative parts
Applications
Thread (ST) 60°, model: BMXX
Dimensional accuracy
- Size: M1.0–M2.0
- Head styles: flat head (C) / pan head (P)
- Drive: Phillips, Torx
- Material: stainless steel, carbon steel
- Surface treatment: zinc plating...
- Design note: for micro self-tapping screws use a dedicated pilot hole sized to the industry-standard pitch, keep 3–5 threads of effective engagement and maintain minimum wall thickness to prevent stripping, screw breakage and plastic cracking.
| Size | Pitch P (mm) | Recommended min. thread length (mm) | Recommended pilot hole, steel/aluminum (mm) | Min. pilot hole (mm) | Max. pilot hole (mm) | Panel thickness (mm) |
|---|---|---|---|---|---|---|
| ST1.0 | 0.4 | 1.5 | 0.7 / 0.8 | 0.65 | 0.85 | 0.4 ~ 0.8 |
| ST1.2 | 0.4 | 1.5 | 0.9 / 1.0 | 0.85 | 1.05 | 0.5 ~ 1.0 |
| ST1.4 | 0.45 | 1.8 | 1.0 / 1.1 | 0.95 | 1.15 | 0.6 ~ 1.2 |
| ST1.5 | 0.5 | 2 | 1.1 / 1.2 | 1.05 | 1.25 | 0.7 ~ 1.4 |
| ST1.6 | 0.5 | 2 | 1.2 / 1.3 | 1.15 | 1.35 | 0.7 ~ 1.5 |
| ST1.8 | 0.55 | 2.3 | 1.3 / 1.4 | 1.25 | 1.45 | 0.8 ~ 1.6 |
| ST2.0 | 0.6 | 2.5 | 1.5 / 1.6 | 1.45 | 1.65 | 1.0 ~ 2.0 |
11
Cosmetic screws – PVD (CD pattern)
Overview
PVD (physical vapor deposition) is a high-end coating process in which a target material is atomized in a vacuum and deposited on the workpiece as a dense film ranging from nanometers to micrometers in thickness.
Features and benefits
- Extremely hard, wear and scratch resistant; threads resist wear and chipping
- Strong corrosion resistance: salt-spray and humidity resistant
- Ultra-thin film does not affect precision and does not clog threads or change assembly clearance
- Low friction and self-lubricating: smooth driving, stable torque, no thread stripping
- No hydrogen embrittlement, environmentally safe, excellent appearance that will not fade or peel
Products
Silver PVD screw
Black PVD screw
Gold PVD screw
Specifications
- Dimensional accuracy: size M1.0–M2.0
- Head style: flat head (C)
- Drive: Torx, hex socket
- Material: stainless steel, stainless iron (SUS410)
- Surface finish: PVD
- Design note: match the drive geometry to the screw size and, under extreme space constraints, strictly control the minimum wall thickness in weak areas to avoid breakage during driving and cracking of the structure.
| Size (d) | Head thickness (b) | Thread length (c) | Drive depth (q) | Wall thickness (e) | Drive type |
|---|---|---|---|---|---|
| M1.0X0.25P | 0.30min | 0.9min | 0.20min | 0.12min | T1/1IP |
| M1.2X0.25P | 0.40min | 1.1min | 0.30min | 0.17min | T2/2IP |
| M1.4X0.3P | 0.50min | 1.4min | 0.40min | 0.23min | T3/3IP |
| M1.6X0.35P | 0.30min | 1.6min | 0.50min | ... | T4/4IP |
| M2.0X0.4P | 0.30min | 2.0min | 0.60min | ... | T5/5IP |
Applications
PVD color chart
Silver ①
Silver ②
Black ①
Black ②
Gold ①
Gold ②
Rose gold ①
Dark brown ①
Dark brown ②
Blue ①
12
Anti-loosening treatment
Materials and processes fall into four groups: standard series — microcapsule series (active) and nylon series (passive); special series — sealing and waterproof series, and vibration-damping series.
Features and benefits
- Ultra-high precision: smallest production size M0.8 × 1.0 mm
- Coating available at 90°–180° or full 360°
- Coating available on the surface and inside the hole
≥9° locking zone · locking length 4+ threads · 0–3 lead threads
Anti-loosening treatment over the full 360° circumference or at specific positions
Please contact our technical team directly
13
Thread-locking compound series (anaerobic adhesive)
1. A pre-applied compound of microcapsules, resin and hardener. When the coated screw is driven into the mating part the microcapsules burst and release the liquid, which reacts with the resin and hardener and cures, locking the screw against loosening.
2. Coverage: full 360° of the circumference, preferably over 5 pitches or more.
3. Features: locking plus sealing; permanent fixing for single use.
4. Color: several colors are available depending on locking strength, service temperature and material supplier design
5. Applications: eyewear, furniture, bicycles, ice skates, taps, sports equipment and more
14
Engineering plastics series: nylon pre-applied patch
1. A nylon patch is applied over the thread; when the screw is driven into the mating part the patch deforms elastically, fills the clearance and generates high friction that prevents loosening.
2. Coverage: 90°–180° of the circumference, preferably over 5 pitches or more.
3. Features: anti-loosening with adjustable positioning; removable and reusable; simple, efficient assembly; resistant to high and low temperatures (-50 °C to 200 °C).
4. Color: several colors are available depending on locking strength and service temperature
15
Sealing treatment
The screw is pre-coated with a sealing compound that gives excellent sealing performance and prevents leakage. Compared with O-rings and nylon washers it is easier to install, does not tear and seals more consistently, and it forms to the shape of the mating part — a low-cost, easy-to-assemble head sealing solution.
Features and benefits
- Exceptional sealing and leak prevention
- More efficient assembly at lower cost
- Excellent adaptability
- Stable, reliable performance
16
Industry challenge
Cost influence model across the project cycle
In today's fast-moving market the core challenge for R&D teams is that the early decision window is extremely short yet fixes most of the cost, while later correction is very expensive — a serious mismatch between risk and reward. Companies must therefore make accurate judgements at the earliest possible stage to cope with market uncertainty.
The 15–85 rule
A second challenge: companies focus on visible purchasing cost while overlooking the 85% of hidden cost. Without systematic coordination across design, supply chain and after-sales, early decision errors lead to high manufacturing cost, rework and quality claims, driving up total lifecycle cost.
15% visible cost: fastener purchasing cost
85% hidden cost: design, logistics, warehousing, assembly, after-sales
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YF ZCJ Six Services
From continuous prototyping to total cost optimization: professional training, design consulting, rapid samples, professional testing, teardown analysis and process optimization.
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Summary
YF ZCJ consumer electronics micro screws cover the full M0.6–M2 range, with machine threads, self-tapping threads, PVD cosmetic finishes and pre-applied anti-loosening and sealing systems. Material, drive, head style and surface finish can all be customized, and their high precision, low magnetism and vibration resistance suit automated assembly of thin, lightweight consumer electronics — backed by full fastener supply-chain support.
Company information
YF ZCJ Precision Hardware (Shenzhen) Co., Ltd. | Headquarters: 深圳市坪山区坑梓街道秀新社区坑梓中兴路13号C1栋101及整栋 Tel: 0755-84061349
Zhichengjia Metal Technology (Xiangyang) Co., Ltd. | Automotive plant: 湖北省襄阳市谷城县城关镇三岔路经济开发区 Tel: 0710-7269998
Website: www.zcjtech.com
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