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You’re working on a marine project, a chemical processing rig, or any equipment that lives in a harsh environment – and regular screws just don’t last. These pan head Torx screws are made from 304 stainless steel (A2), giving you excellent resistance to saltwater, chemicals, and heat. The Torx star drive eliminates cam‑out, letting you drive them with confidence even in tight spots. The pan head sits low with a wide bearing surface, perfect for thin panels or soft materials. Available in thread diameters from tiny M1.4 up to M12, with lengths to match (select from dropdown). Whether you’re building seawater pumps, dyeing machinery, or paper plant equipment, these screws hold up where others fail.
| Thread Diameter | Available Lengths (mm) * | Torx Size (approx.) | Typical Applications |
|---|---|---|---|
| M1.4 | 3, 4, 5, 6, 8, 10, 12 | T3 | Micro‑electronics, medical devices, small instruments |
| M1.6 | 3, 4, 5, 6, 8, 10, 12, 16 | T4 | Cameras, RC models, precision gear |
| M2 | 3, 4, 5, 6, 8, 10, 12, 16, 20 | T5 | PCBs, laptops, small appliances |
| M2.5 | 4, 5, 6, 8, 10, 12, 16, 20, 25 | T6 | 3D printers, drone components |
| M3 | 4, 5, 6, 8, 10, 12, 16, 20, 25, 30, 35, 40 | T8 | Electronics enclosures, furniture, DIY |
| M4 | 5, 6, 8, 10, 12, 16, 20, 25, 30, 35, 40, 45, 50 | T10 | Small machinery, automotive trim, marine hardware |
| M5 | 6, 8, 10, 12, 16, 20, 25, 30, 35, 40, 45, 50 | T15 | Boat fittings, chemical plant equipment |
| M6 | 8, 10, 12, 16, 20, 25, 30, 35, 40, 45, 50, 60 | T20 | Heavy machinery, seawater pumps, industrial frames |
| M8 | 10, 12, 16, 20, 25, 30, 35, 40, 45, 50, 60, 70, 80 | T25 | Structural fasteners, dyestuff equipment |
| M10 | 12, 16, 20, 25, 30, 35, 40, 45, 50, 60, 70, 80 | T30 | Paper machinery, large flanges |
| M12 | 16, 20, 25, 30, 35, 40, 45, 50, 60, 70, 80, 100 | T40 | Heavy industrial, shipbuilding |
* Lengths are measured from under the head to the tip. Available lengths vary by diameter – select from the dropdown. All screws are fully threaded for most lengths; longer M8+ may have partial threads.
| Parameter | Details |
|---|---|
| Corrosion resistance | Excellent – resistant to seawater, chemicals, acids, alkalis, and oxidation |
| Heat resistance | Good – continuous service up to ~870°C (intermittent) |
| Strength | High tensile strength (approx. 700 N/mm² for A2-70), high toughness |
| Head style | Pan head (low profile, wide bearing surface) |
| Drive style | Torx (star) – multiple sizes from T3 to T40 depending on thread diameter |
| Thread standard | Metric coarse (DIN / ISO) |
| Magnetic | Almost non‑magnetic (slightly magnetic due to cold working) |
| Typical industries | Seawater equipment, chemical, dyestuff, paper, marine, automotive, electronics |
1. Why choose Torx drive over Phillips or hex socket?
Torx (star) drive virtually eliminates cam‑out – the bit doesn’t slip out under torque. This means you can drive screws faster with power tools without damaging the screw head. Torx also distributes force more evenly across the recess, reducing wear. For high‑torque applications or assembly lines, Torx is superior.
2. Are these screws suitable for saltwater / marine use?
Yes – 304 stainless steel (A2) is widely used in marine applications. It resists corrosion from seawater and salt spray. For continuous underwater immersion or very high chloride environments, we recommend A4 (316) stainless, but for most boats, docks, and coastal equipment, A2 is excellent and much more common.
3. What Torx bit size do I need for each screw diameter?
Typical matching: M1.4→T3, M1.6→T4, M2→T5, M2.5→T6, M3→T8, M4→T10, M5→T15, M6→T20, M8→T25, M10→T30, M12→T40. Always check the exact fit – a Torx bit should fill the recess completely without wobbling.
4. Can I use these screws in chemical plants or with aggressive fluids?
304 stainless offers good resistance to many organic and inorganic chemicals, including dyes, weak acids, and alkalis. However, for strong acids (e.g., hydrochloric, sulfuric) or chlorides at high temperatures, 316 (A4) is better. Always verify compatibility with your specific chemical environment.
5. Are the screws fully threaded? How do I measure length?
For pan head screws, length is measured from the underside of the head (the flat bearing surface) to the tip. Most lengths up to about 50mm are fully threaded. Longer screws (e.g., M8 x 80mm) may have a partial thread (unthreaded shank near the head). Check the product images or contact us for specific lengths.
6. Do you sell matching Torx drivers or bits?
We currently sell screws only. However, Torx bits are widely available at hardware stores or online. We recommend buying a quality set of metric Torx drivers (T3 to T40) to match your screws.
