M3.5 Pozi Pan Head Machine Screws – A2 Stainless Steel (304), 10mm–100mm Lengths

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Description

🔩 M3.5 Pozi Pan Head Machine Screws – A2 Stainless Steel (304), 10mm–100mm Lengths

Need a reliable metric screw for your next assembly or repair? These M3.5 Pozi pan head machine screws are made from A2 (304) stainless steel – rust‑resistant, strong, and suitable for both indoor and outdoor use. The Pozi drive (similar to Phillips but with extra cross‑points) offers better bit engagement and reduces cam‑out, making it easier to drive without slipping. Choose from lengths 10mm up to 100mm, and pack sizes from single pieces to bulk 300. Perfect for electronics enclosures, 3D printer parts, automotive trim, marine hardware, and any project that calls for a corrosion‑proof fastener with a low‑profile round head.

✨ Why These M3.5 Pozi Stainless Screws Belong in Your Hardware Kit

A2 (304) stainless steel – Excellent corrosion resistance, non‑magnetic, and durable. Won’t rust like standard zinc‑plated screws. Ideal for kitchen, bathroom, marine, and outdoor applications.

Pozi drive (Type H / Pozidriv) – Unlike Phillips, Pozi has additional small cross‑marks and straight sidewalls. Provides deeper bit engagement, higher torque transfer, and much less cam‑out. Works best with a Pozi screwdriver or bit (but also accepts Phillips bits with reduced performance).

Pan head with flat bearing surface – Low profile, slightly domed top. Ideal for counterbored holes or where the screw head sits above the surface. Provides a clean, finished look.

Wide length range (10mm – 100mm) – Choose exactly what you need: 10, 12, 14, 16, 20, 25, 30, 35, 40, 50, 60, 70, 80, 90, 100mm. Thread size is M3.5 (3.5mm diameter).

Flexible pack quantities – Sold in packs of 1, 5, 10, 25, 50, 100, 200, or 300. Perfect for prototyping, small repairs, or bulk inventory.

Untreated natural finish – No added coatings, so the pure stainless steel surface is smooth and consistent. Suitable for food contact and clean environments (though not certified food grade).

💡 Pro tip: Use a dedicated Pozi (PZ) screwdriver bit for maximum torque and minimal stripping. A Phillips bit will work, but may slip under high force – we recommend Pozi bits for best results.

📏 Specifications – M3.5 Pozi Pan Head Machine Screws

Parameter Details
Thread Size M3.5 (3.5mm diameter, metric coarse thread)
Head Style Pan head (round, low dome)
Drive Type Pozi (Pozidriv / Type H) – cross recess with extra straight sidewalls
Material A2 stainless steel (304 grade), corrosion‑resistant
Surface Finish Untreated / natural (no plating)
Available Lengths (L) 10 / 12 / 14 / 16 / 20 / 25 / 30 / 35 / 40 / 50 / 60 / 70 / 80 / 90 / 100 mm
(thread diameter 3.5mm, length does not include head height)
Pack Sizes 1, 5, 10, 25, 50, 100, 200, 300 pieces per pack
Measurement System Metric

📌 Example: M3.5×20 means thread diameter 3.5mm, length 20mm (excluding head). Head height is approx. 2mm.

💬 Frequently Asked Questions – M3.5 Pozi Stainless Steel Screws

What is the difference between Pozi (Pozidriv) and Phillips drive?
Phillips bits have pointed tips and tapered sidewalls, designed to cam‑out (slip) at high torque to avoid damaging the screw or workpiece. Pozi bits have blunt tips and parallel sidewalls, plus four additional smaller contact points. This gives much better bite and higher torque transfer without slipping. Pozi screws are common in European and industrial applications. They work with Phillips bits in a pinch, but for best results use a dedicated Pozi driver (PZ1 for M3.5).
Are these screws magnetic?
304 stainless steel is generally non‑magnetic or only very weakly magnetic after cold forming. These screws may exhibit slight magnetism near the head, but overall they are not “sticky” like regular steel. This is normal for A2 stainless and does not affect corrosion resistance.
Will these screws rust outdoors or near saltwater?
A2 (304) stainless steel offers good corrosion resistance in most outdoor environments, fresh water, and mild chemical exposure. However, in direct saltwater immersion or heavy marine spray, 316 stainless is recommended. For typical outdoor furniture, garden equipment, or coastal areas with occasional spray, 304 is usually fine. Wipe off salt residue periodically.
What size Pozi screwdriver do I need for M3.5 screws?
M3.5 screws typically use a Pozi #1 (PZ1) driver. PZ0 is too small, PZ2 is too large. If using a Phillips bit, a PH1 may fit but expect less torque transfer. We strongly recommend using a quality PZ1 screwdriver or bit for best results.
Can I use these screws in threaded brass inserts or plastic?
Yes – M3.5 is a standard metric thread. They work perfectly in M3.5 threaded inserts, tapped holes, or self‑tapping into soft plastics (pre‑drill a smaller pilot hole). For hard plastics or metal, always use a pre‑tapped hole or nut.
What is the tolerance on length? Is 10mm exactly 10mm from under the head?
Yes, machine screw length is measured from the underside of the head to the threaded tip (excluding head height). Manufacturing tolerance is typically ±0.5mm for lengths under 50mm, and ±1mm for longer screws. Our screws meet standard metric DIN/ISO tolerances.

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