Torx Flat Head Machine Screws M1.6–M3 — Precise Drive, Flush Fit for Compact Assemblies
When you're assembling electronics, optical instruments, or precision enclosures, a stripped Phillips head on a tiny M2 screw can bring an entire build to a halt. These Torx flat head machine screws in M1.6, M2, M2.5, and M3 are designed for engineers, makers, and repair technicians who need a reliable countersunk fastener with a drive that resists cam-out — even in tight spaces with limited torque control. The star-shaped Torx recess distributes driving force more evenly than Phillips or slotted drives, making these screws a practical choice for small-format precision work.
Each pack contains 100 to 500 identical screws (select your quantity above). Screw sizes range from M1.6×3mm (≈3/32") up to M3×19mm (≈3/4"), with head diameters from 2.5mm to 6.7mm and Torx drive sizes T5, T6, T8, T10, and T15 — all clearly listed in the size variant name. Select variants include special configurations: pin-in-Torx (tamper-resistant, requires security Torx bit), dog point tip (for alignment), flat base tip (for blind holes), and partial thread options. Surface finishes available include Nickel-plated, White Zinc, Blue Zinc, Black Zinc-Plated, Stainless, and Stainless(Black), among others.
Typical applications include PCB and electronics enclosure assembly where flush-mount fasteners are required, optical and camera equipment repair using small metric Torx countersunk screws, consumer electronics disassembly and reassembly with tamper-resistant pin-in-Torx variants, and precision instrument housing fabrication where M2 or M2.5 flat head screws with a clean finish are specified.
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Thread Compatibility: These screws follow the ISO metric thread standard (M1.6, M2, M2.5, M3). They are compatible with standard metric nuts, threaded inserts, and tapped holes of the matching size. They are not compatible with inch-thread (UNC/UNF) fasteners. Pin-in-Torx variants require a security Torx bit with a center hole — standard Torx bits will not seat correctly.
✅ Key Features of These Torx Flat Head Machine Screws
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⭐Torx Drive for Cam-Out Resistance — The 6-point star Torx recess transfers torque more efficiently than Phillips or slotted drives, reducing the risk of bit slip and head damage — especially important when driving small M1.6–M3 countersunk screws in tight spaces.
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📐Flat Countersunk Head for Flush Installation — The flat head sits flush with or below the mating surface in a properly prepared countersink, delivering a clean, snag-free finish ideal for electronics enclosures, panels, and precision instrument housings.
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🔒Tamper-Resistant Pin-in-Torx Options — Select size variants include a center pin in the Torx recess, requiring a security Torx bit to drive. These are commonly used in consumer electronics and access-controlled enclosures where standard tools should not be able to remove the fastener.
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🎨Wide Range of Surface Finishes — Available in Nickel-plated, White Zinc, Blue Zinc, Black Zinc-Plated, Stainless, and Stainless(Black), allowing you to match the finish to your application's corrosion requirements and aesthetic — from bright silver to matte black metric Torx screws.
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📦Flexible Pack Quantities (100–500 pcs) — Order exactly what you need: 100-piece packs for prototyping and repair, up to 500-piece packs for production runs and stocking your parts bin with small metric countersunk Torx screws.
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⚙️Specialty Tip Configurations Available — Certain variants include dog point tips (for alignment into blind holes) or flat base tips (for bottoming in blind holes), and partial-thread options — giving you the right fastener geometry for demanding precision assembly tasks.
📐 Technical Specifications — Torx Flat Head Metric Machine Screws
| Product Type |
Flat Head (Countersunk) Machine Screws with Torx Drive |
| Drive Type |
Torx (T5, T6, T8, T10, T15) — see individual size variant for T-size |
| Head Style |
Flat / Countersunk (metric standard angle) |
| Thread Sizes Available |
M1.6, M2, M2.5, M3 |
| Thread Standard |
ISO Metric (DIN 965 / similar) |
| Length Range |
3mm (≈1/8") to 19mm (≈3/4") — varies by thread size; see variant options |
| Head Diameter (D) |
2.5mm to 6.7mm — see individual size variant |
| Surface Finishes Available |
Nickel-plated, White Zinc, White Zinc Blue, Blue Zinc, Blue Zinc Blue, Black Zinc-Plated, Black Zinc-Plated Blue, Black, Stainless, Stainless(Black), Stainless(Black Zinc-Plated), Stainless(Black Zinc-Plated Blue) |
| Special Configurations |
Standard, Pin-in-Torx (tamper-resistant), Dog point, Flat base, Partial thread — see size variant name |
| Pack Quantities |
100 / 200 / 300 / 400 / 500 pcs per pack |
| Material |
Steel (zinc/nickel plated variants) or Stainless Steel (stainless variants) |
| Tensile Strength |
Contact us to confirm for specific size and finish combinations |
| Country of Origin |
See variant options |
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Important: These are standard machine screws — they require a pre-tapped hole, threaded insert, or matching nut. They are not self-tapping. Pin-in-Torx variants require a security Torx bit (with center hole) — a standard Torx bit will not fit. Check the size variant name carefully for the T-size and any special tip configuration before ordering.
❓ Frequently Asked Questions
How do I choose the right screw length for M1.6–M3 countersunk screws?
A general rule is to use a screw length that is 2–3 times the thickness of the material being fastened. For example, when securing a 1.5mm (≈1/16") PCB to a standoff, an M2×4mm or M2×5mm screw is typically appropriate. Always account for the countersink depth so the flat head sits flush with the surface. For blind holes, ensure the thread engagement is at least 1.5× the screw diameter — for an M3 screw, that means at least 4.5mm of thread engagement in the tapped hole.
What Torx bit size do I need, and where is it listed?
The Torx drive size is listed directly in each size variant name (e.g., "M2*4 D=4 T6" means T6 drive). T5 is typically used for M1.6 screws, T6 for M2, T8 for M2.5 and some M3, and T10 or T15 for larger M3 variants. Always match the bit to the listed T-size — using the wrong size can strip the recess. For pin-in-Torx (tamper-resistant) variants, a security Torx bit with a center hole is required; standard Torx bits will not seat correctly.
What is the difference between standard and pin-in-Torx (tamper-resistant) variants?
Standard Torx screws can be driven with any matching Torx bit. Pin-in-Torx variants (labeled "With pin" in the size option) have a small center post in the recess that prevents standard Torx bits from seating. They require a security Torx bit with a matching center hole. These are commonly used in electronics, consumer products, and enclosures where tamper resistance is needed — preventing removal with standard workshop tools.
Which surface finish should I choose for my application?
Choose based on your environment and appearance requirements. Nickel-plated and zinc finishes (White Zinc, Blue Zinc) offer moderate corrosion resistance suitable for indoor use. Black Zinc-Plated provides a dark matte appearance with similar protection. Stainless steel variants offer the best corrosion resistance and are generally suitable for humid or light outdoor environments. Stainless(Black) provides both corrosion resistance and a dark aesthetic, commonly specified in electronics and consumer devices where a black finish is required.
Can these screws be used outdoors or in humid environments?
Stainless steel variants are generally suitable for light outdoor use in dry to moderately humid environments. Zinc-plated and nickel-plated variants are typically recommended for indoor use only. For prolonged outdoor exposure, salt spray, or marine environments, stainless steel is the better choice among the available finishes. If you are unsure which finish is appropriate for your environment, please contact us before ordering.
Are these screws compatible with standard metric threads and nuts?
Yes. These screws follow the ISO metric thread standard (M1.6, M2, M2.5, M3). They are compatible with standard metric nuts, threaded inserts, and tapped holes of the matching diameter and pitch. They are not compatible with inch-thread (UNC/UNF) fasteners. Always verify the thread pitch of your tapped hole or nut before ordering — metric and inch threads are not interchangeable.
How strong are these small metric machine screws?
These screws are designed for light-duty fastening applications such as electronics assembly, PCB mounting, optical equipment, and small enclosures. Exact tensile strength depends on the material and finish selected — stainless steel variants generally offer higher corrosion resistance while maintaining good strength for their size class. For structural or high-load applications, please contact us to confirm specifications for the specific size and finish you need.
What does "dog point" or "flat base" mean in the size options?
A "dog point" screw has a smooth, reduced-diameter tip extending beyond the threads, which helps with alignment during assembly — useful when threading into a hole that needs to be located precisely before the threads engage. A "flat base" variant has a flat (non-pointed) tip, typically used when the screw bottoms out in a blind hole or when a flush internal end is needed. Select the tip style based on your specific assembly requirements.
🛒 Select your size, quantity, and surface finish above, then add to cart — ships from our US warehouse.
