🌊 Product Overview: M6 & M8 A4 Stainless Steel Round Pan Head Phillips Screws – Flat Tail, Fully Threaded
When you're working on marine equipment, coastal structures, or chemical plants, standard stainless steel often isn't enough. These M6 and M8 round pan head Phillips machine screws are made from A4 (316) stainless steel – the marine grade with added molybdenum for exceptional resistance to saltwater, chlorides, and industrial chemicals. The round pan head sits flush on surfaces for a clean, professional finish, while the Phillips drive works with standard #2 and #3 bits. Fully threaded with a flat tail (plain end), these screws are ideal for boat hardware, dock fittings, outdoor furniture, and any application where long‑term corrosion resistance is critical. Available in lengths from 8mm to 100mm (measured under the head). From China with consistent quality – choose your size and quantity.
✨ Why Choose A4 Stainless Steel Round Pan Head Phillips Screws
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A4 stainless steel (316 / marine grade) – Superior corrosion and acid resistance. Contains molybdenum for excellent performance in saltwater, chemical media, and coastal environments.
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Round pan head design – Low‑profile rounded head with a flat bearing surface. Sits flush on panels, distributes clamping force evenly, and gives a professional finish.
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Phillips drive – standard and easy – Works with common #2 (M6) and #3 (M8) Phillips bits. Quick installation with no special tools required.
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Flat tail (plain end) – Clean, flat tip – ideal for general fastening into tapped holes or with nuts. No sharp burrs to damage threads.
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Metric sizes M6 and M8 – Medium‑duty diameters perfect for furniture, machinery, automotive, marine hardware, and structural fastening.
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Lengths from 8mm to 100mm (under head) – Short screws for thin panels, long ones for thick assemblies. Choose exactly what you need.
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Fully threaded, coarse metric pitch – M6x1.0, M8x1.25. Threads run the entire shank length for maximum grip and easy nut engagement.
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Made in China, quality assured – Consistent dimensions and clean threads. Pack quantity according to your option.
📏 Technical Specifications – M6 & M8 A4 Stainless Pan Head Phillips Screws
| Specification |
M6 |
M8 |
| Thread Diameter (d) |
6mm |
8mm |
| Thread Pitch (p) |
1.0mm |
1.25mm |
| Head Style |
Round pan head (low profile) |
| Drive Style |
Phillips (PH2 for M6, PH3 for M8 recommended) |
| Material |
A4 Stainless Steel (316 / marine grade) |
| Thread Type |
Fully threaded |
| End Type |
Flat tail (plain end) |
| Length Measurement |
Under head – from flat bearing surface to tip (excludes head height) |
| Length Range |
8mm – 100mm (select from options) |
| Finish |
Natural stainless (unplated, bright) |
❓ FAQs – A4 Stainless Round Pan Head Screws
🔸 What’s the difference between A4 (316) and A2 (304) stainless steel?
A4 (316) contains molybdenum, which greatly improves resistance to chlorides – that means saltwater, de‑icing salts, and many industrial chemicals. A2 (304) is fine for most indoor and general outdoor use, but A4 is the standard for marine, coastal, and chemical environments. It lasts significantly longer in harsh conditions.
🔸 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 round pan head. For example, an M8 x 40mm screw has a 40mm threaded shank.
🔸 Will A4 stainless steel rust in saltwater?
A4 (316) stainless is highly resistant to saltwater corrosion and is the go‑to choice for boat hardware, dock fittings, and submerged applications. While no metal is completely immune to crevice corrosion in stagnant, low‑oxygen conditions, 316 performs excellently for most marine use. Rinse occasionally with fresh water for maximum lifespan.
🔸 What Phillips screwdriver size works for M6 and M8?
For M6, use a PH2 (cross tip #2). For M8, use a PH3 (cross tip #3) for best engagement, though a PH2 will work in a pinch. Using the correct size prevents stripping.
🔸 Can I use these screws with nuts, or are they self‑tapping?
These are standard machine screws – they require a matching M6 or M8 metric nut or a pre‑tapped hole. They are not self‑tapping. For best corrosion resistance, pair them with A4 stainless nuts.
🔸 What lengths are available for M6 and M8?
We offer lengths from 8mm up to 100mm in standard increments. Typical options include 8, 10, 12, 16, 20, 25, 30, 35, 40, 45, 50, 60, 70, 80, 90, 100mm. Please select from the dropdown menu.
