high-quality small self-tapping screws for electronics

Tiny Size, Mighty Grip

No Stripping, Just Driving

The Fix for Every Miniature Challenge

Sinsun Small Self-Tapping Screws: Precision Fasteners for Modern Manufacturing & Repair

Sinsun supplies high-quality small self-tapping screws for electronics, appliances, and precision metalwork. From M1.0 to M3 sizes in steel, stainless steel & more. Reliable, efficient fastening solutions for professionals.

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Stainless Steel Hex Head self drilling screw

Sinsun Small Self-Tapping Screws | Micro Fasteners for Electronics, Appliances & Precision Assembly

Sinsun Small Self-Tapping Screws are precision fasteners engineered for applications where space is constrained and material integrity is critical.
Defined by diameters from M1.0 to M3.0 and lengths under 20mm, these screws are designed to create strong, reliable threads directly in thin-gauge sheet metal, plastics, and soft alloys without the need for pre-tapped holes.
This capability is essential for efficient assembly in modern electronics, miniature devices, and precision instrumentation.

Our manufacturing advantage lies in controlled precision and material science.
We utilize high-carbon steel or A2/A4 stainless steel, applying precise heat treatment to achieve an optimal balance of hardness and ductility, preventing thread stripping or screw shearing during installation.
Every batch undergoes stringent dimensional checks to ensure consistent head geometry, drive recess depth (for PH00, PH0, or slotted drives), and thread pitch.
This guarantees uniform driving torque and seating depth, which is vital for automated assembly lines and manual precision work alike.

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Sinsun's small self-tapping screws are manufactured to exacting standards, providing engineers and procurement teams with precision and reliability.

With our product line, we address four core challenges of miniaturized fastening:

Material: This item is made of hardened carbon steel, stainless steel (A2/A4), or special alloys to prevent stripping and shearing.

Performance: Ensures uniform driving torque and seating depth with consistent thread geometry and point design.

Specific Design: We offer thread-forming for plastics and thread-cutting for harder metals, which provides the best grip and puts the least amount of stress on the materi.

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Big Strength, Tiny Package.

Precision Driven, Every Time.

For When Every Millimeter Counts.

SinsunVery Small Self-Tapping Screws: Detailed Technical Specifications

This table provides the complete technical specifications for Sinsun's range of small self-tapping screws, engineered for precision applications in electronics, appliances, and micro-assembly.

Specification Category	Details & Options
Core Dimensions	Metric Diameter (Major): M1.0, M1.2, M1.4, M1.6, M2.0, M2.5, M3.0, M3.5
	Imperial Diameter (Approx.): #0, #1, #2, #3, #4, #6, #8, #10
	Common Length Range: 1.5mm to 20mm (standard), up to 25mm available.
	Thread Pitch: Standard coarse pitch for self-tapping (e.g., M2 = 0.4mm pitch). Fine pitch available for specific metals/plastics.
Materials & Metallurgy	Carbon Steel: Grade 1022A, case hardened to 42-48 HRC.
	Stainless Steel: Austenitic AISI 304 (A2) or 316 (A4) for corrosion resistance.
	Brass: For specialized conductive or non-magnetic applications.
Mechanical Properties	Core Hardness (Carbon Steel): 42-48 HRC.
	Tensile Strength (Carbon Steel): Minimum 800 MPa.
	Tensile Strength (Stainless 304): Minimum 700 MPa.
	Proof Load: Certified data available per ISO 898-1.
Point & Thread Design	Type AB / A: Standard sharp gimlet point for thin metal & general use.
	Type B / Bt: Blunt point with spaced threads for plastics to reduce splitting.
	Type C: Coarse thread for soft materials like wood or aluminum.
	Self-Drilling Point (Tek): Available for diameters M2.5 and above for direct penetration of thin steel.
Head Styles	Pan Head: Low-profile, rounded top.
	Flat Head / Countersunk (82°/90°): For flush mounting.
	Oval Head: Decorative flush-to-partial countersink.
	Hex Socket Head (Cap): For high-torque applications.
	Washer Head / Flange Head: Integrated washer for load distribution.
Drive Types	Phillips: PH00, PH0, PH1 sizes.
	Pozidriv: PZ00, PZ0, PZ1 for reduced cam-out.
	Slotted: For simple applications.
	Hex Socket (Allen): 0.7mm, 0.9mm, 1.3mm, 1.5mm, 2.0mm keys.
	Torx® / Star Drive: T3, T4, T5, T6, T7, T8 for superior torque transfer.
Finishes & Coatings	Carbon Steel: Zinc plating (blue/clear/yellow chromate), nickel plating, black oxide.
	Stainless Steel: Passivated (clear), electropolished.
	Corrosion Resistance: Salt spray test hours vary (e.g., Zn plating: 72-120h red rust; SS: 500h+).
Standards & Compliance	Manufactured to meet or exceed dimensional and mechanical standards of: ISO 2702, DIN 7981, DIN 7982, ASME B18.6.4, JIS B 1122. RoHS & REACH compliant.

Guide to Choosing Applications

To choose the best screw, consider the following

Consumer Electronics and Smart Devices

For sheet metal (less than 1.5mm) or pre-drilled holes, use a Type AB point. Use a Type B (Bt) blunt point with wide threads on plastics to reduce hoop stress and prevent the boss from cracking. If you want to screw directly into thin steel without a pilot hole, use a Self-Drilling (Tek) point.
Calculating Length

The ideal screw length is the thickness of the material plus the minimum engagement. To achieve reliable threads in metal, you need to engage at least three full thread diameters. When working with plastic, ensure that you screw into the boss at least 2 to 2.5 times the screw diameter.
Choosing a Material/Finish

For general indoor use, use plated carbon steel. Use A2-304 stainless steel in places with a lot of moisture or where chemicals are present. For harsher conditions (marine, chemicals), choose A4-316 stainless steel. Black oxide appears clean, but it doesn't protect against corrosion very well.
Drive and Head Selection

For high-torque precision assembly, Torx or Pozidriv drives are best because they stop cam-out. Use Flat Head for flat surfaces and a Pan/Washer Head for surfaces where a small bearing surface is fine.

Sinsun small self tapping metal screws: Core Product Advantages

The table below summarizes the key advantages of Sinsun Small Self-Tapping Screws, highlighting the engineered solutions they provide for precision fastening challenges.

Advantage	Description
Precision Engineering & Consistency	Manufactured to tight tolerances (ISO 2702 / DIN 7981 standards) for diameters from M1.0 to M3.5. Ensures reliable feeding in automated assembly and consistent seating torque for uniform product quality.
High-Strength Material Integrity	Made from case-hardened carbon steel (42-48 HRC) or A2/A4 stainless steel. Provides optimal strength-to-size ratio, resisting shear and stripping even in the smallest sizes for durable fastening.
Application-Optimized Design	Offers a range of point styles (Type AB for metal, Type B for plastic, self-drilling Tek) and head/drive combinations (Torx, Phillips, hex). This allows exact matching to your specific base material and assembly process.
Enhanced Corrosion Protection	Available with electroplated zinc (blue, clear, yellow), black oxide, or passivated stainless steel finishes. Provides tailored resistance against oxidation and environmental factors for extended product life.
Technical Support & Customization	We provide material certification, application-specific selection guidance, and support for custom specifications (non-standard lengths, special drives, marking) to meet unique project requirements.

If you have a specific application scenario, I can help you analyze which of these advantages and product specifications are most critical for your needs.

Applications and Sinsun Solutions

Consumer Electronics and Smart Devices

Function: Secures internal structural components (e.g., motherboard brackets, battery covers, mid-frames) in smartphones, tablets, and laptops, as well as plastic enclosures connecting smart home devices.

Sinsun Solution: Recommends stainless steel or nickel-plated M1.4-M2.0 screws to prevent electromagnetic interference and meet aesthetic requirements. Countersunk design ensures a flush enclosure surface.

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Precision Instruments & Medical Devices

Function: Assembles optical instruments, sensors, laboratory equipment, and housings for certain reusable medical devices.

Sinsun Solution: Offers A4-316 stainless steel screws with excellent chemical corrosion resistance. Non-magnetic variants are available for precision instruments to prevent interference.

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Automotive Electronics & Interior Components

Function: Secures in-vehicle displays, control modules, dashboard trim panels, and various wiring harness clip bases.

Sinsun Solution: Utilizes high-strength zinc-plated steel or corrosion-resistant coated screws. Self-tapping pointed tips effectively engage plastic clip columns, delivering reliable vibration resistance against loosening.

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Automotive-Electronics-&-Interior-Components

Small Appliances and Model Making

Function: Used to secure internal structures of small appliances like hair dryers and electric shavers, also ideal for assembling metal components in high-end models and RC cars.

Sinsun Solution: Offers economical galvanized steel screws and color-coated screws. A wide range of head styles meets diverse functional and decorative needs.

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Frequently Asked Questions (FAQ)

1

Q: Can I use self-tapping screws instead of pre-tapping?

A: You can use Sinsun small self-tapping screws directly on thin metal sheets (usually less than twice the screw diameter in thickness), plastic parts, and most non-structural connections without having to pre-tap them. This makes the process much faster. If you are drilling into thick metal or materials that are very hard, it is best to make the pilot hole smaller than the screw core diameter to ensure the threads have enough material to bite into without snapping the screw.
2

Q: What is the difference between screws that "self-tap" and screws that "self-drill"?

A: Self-tapping screws need a hole to be drilled in the material ahead of time or they can push through with their pointed tip. Self-drilling screws, on the other hand, have a drill bit-shaped tip that can make its own hole in thin metal. Most small screws can tap their own holes. It is best to select a model with a self-drilling point if you intend to install it on thin steel sheets without pre-existing holes.
3

Q: Can self-tapping screws be used on plastic parts without breaking?

A: Too much radial stress can cause plastic to crack, especially brittle plastics. Suggestions: 1) Use thread-forming self-tapping screws designed for plastic to reduce internal stress. 2) Ensure that the screw diameter is no bigger than 75% of the plastic pillar's outer diameter. This provides enough wall thickness to absorb the expansion as the threads are formed.
4

Q: What should I look for when selecting small screws for automated assembly?

A: It is essential to maintain consistent head sizes (so the feeder will grip the bit), exact length tolerances, stable drive slot profiles, and clean surface finishes (to prevent dust). For large orders, Sinsun offers custom packaging and guarantees that the products will be the same every time to ensure your automated lines run without jamming.

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