⚙️ Product Overview: TA2 Titanium Pozi Countersunk Machine Screws – M1.6 to M6
If you're building lightweight racing drones, high‑end bicycles, or medical devices, every gram counts – and strength cannot be compromised. These TA2 pure titanium Pozidriv countersunk machine screws deliver an exceptional strength‑to‑weight ratio: tensile strength over 750MPa and yield strength over 500MPa, yet about 45% lighter than steel. The Pozi (Pozidriv) drive provides superior torque transfer and virtually eliminates cam‑out compared to standard Phillips. The 90° flat head sinks flush into countersunk holes for a smooth, aerodynamic finish. Available in micro sizes M1.6, M2, M2.5, M3, M4, M5, and M6, with lengths from 4mm to 50mm (measured under the head). Fully threaded with standard coarse metric pitch. Perfect for aerospace, motorsports, marine, and any high‑performance application where reliability and weight savings matter.
✨ Why TA2 Titanium Pozi Countersunk Screws Are a Performance Upgrade
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TA2 pure titanium (Grade 2) – Tensile strength >750MPa, yield strength >500MPa. Excellent mechanical properties, high strength, high hardness, good corrosion resistance, and excellent plasticity.
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Pozidriv (Pozi) drive – Distinct from Phillips, the extra cross‑recesses provide greater torque transfer and significantly reduce cam‑out. Your driver stays engaged, even under load.
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Countersunk flat head (90°) – Sits flush in tapered holes for a smooth, snag‑free finish. Ideal for aerodynamics, panel mounting, and visible assemblies.
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Wide micro to medium size range: M1.6 to M6 – From tiny fasteners for watches and electronics up to M6 for bicycle components and light machinery.
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Lengths from 4mm to 50mm (under head) – Available in multiple lengths. Choose exactly what your project requires.
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Fully threaded, coarse metric pitch – Standard threads: M1.6x0.35, M2x0.4, M2.5x0.45, M3x0.5, M4x0.7, M5x0.8, M6x1.0. Threads run the entire shank length.
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Exceptional corrosion resistance – Outperforms stainless steel in saltwater and chemical environments. Naturally rust‑proof and biocompatible – ideal for medical and marine applications.
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Preferred in aerospace, chemical, and medical fields – TA2 titanium is widely used where high strength, low weight, and corrosion resistance are critical.
📏 Technical Specifications – TA2 Titanium Pozi Countersunk Screws (M1.6–M6)
| Specification |
Details |
| Product Type |
Pozidriv Countersunk Flat Head Machine Screws (Pozi drive) |
| Material |
TA2 Pure Titanium (Grade 2) |
| Drive Style |
Pozidriv (Pozi) – use PZ0, PZ1, or PZ2 bits depending on size |
| Head Style |
Flat / Countersunk (90°) |
| System of Measurement |
Metric |
| Screw Sizes (Diameter) |
M1.6, M2, M2.5, M3, M4, M5, M6 |
| Thread Pitches (coarse)Thread Pitches (coarse) |
M1.6x0.35, M2x0.4, M2.5x0.45, M3x0.5, M4x0.7, M5x0.8, M6x1.0 |
| Thread Type |
Fully threaded |
| Length Range (under head) |
4mm – 50mm (select from options) |
| Length Measurement |
Under head – from flat bearing surface to tip (head not included) |
| Tensile Strength |
>750 MPa |
| Yield Strength |
>500 MPa |
| Finish |
Natural titanium (uncoated) |
❓ FAQs – TA2 Titanium Pozi Screws
🔸 What is the difference between Pozidriv (Pozi) and Phillips drive? Can I use a Phillips driver?
Pozidriv has additional smaller cross‑recesses at 45° angles and a blunter tip. A Phillips driver will fit loosely and will cam‑out or damage the recess. Always use a genuine Pozidriv (Pozi) driver bit – for M1.6–M2.5 use PZ0, for M3–M4 use PZ1, for M5–M6 use PZ2. Using the correct bit gives you much better torque without slipping.
🔸 How do TA2 titanium screws compare to 316 stainless steel?
TA2 titanium is about 45% lighter than 316 stainless steel, with higher tensile strength (>750MPa vs ~550MPa). It also offers superior corrosion resistance, especially in saltwater and chemical environments. Titanium is non‑magnetic and biocompatible. The main trade‑off is cost – titanium is more expensive, but for high‑performance applications (racing, marine, medical), the weight savings and longevity are worth it.
🔸 Are these screws fully threaded? How is length measured?
Yes – they are fully threaded from just under the head to the tip. Length is measured from the underside of the head (the flat bearing surface) to the tip, not including the head. For example, an M4 x 20mm screw has a 20mm threaded shank.
🔸 Will titanium screws gall or seize when installed?
Titanium can gall (cold weld) if installed dry, especially into titanium nuts or threaded holes. We recommend using an anti‑seize lubricant (copper paste or titanium‑specific grease) on the threads – this is standard practice in aerospace and motorsports. For steel or aluminum nuts, galling is less likely but lubricant is still good practice.
🔸 What applications are these tiny M1.6–M6 titanium screws best suited for?
These sizes are perfect for drones and UAVs, RC cars and planes, watches and eyeglasses, medical implants and surgical instruments (though certified medical grade may require additional validation), bicycle components (disc brake mounts, frame hardware), marine electronics, and any weight‑critical, corrosion‑sensitive precision assembly.
🔸 What Pozidriv bit sizes do I need for each screw diameter?
M1.6–M2.5: use PZ0. M3–M4: use PZ1. M5–M6: use PZ2. A good quality Pozi bit set will cover all these sizes. Do not use Phillips bits – they will damage the recess.
