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Corroded fasteners are a maintenance nightmare — seized bolts, rust staining on finished surfaces, and structural failures in wet environments cost time and money. Whether you're building outdoor furniture, assembling marine hardware, or maintaining food-grade equipment, you need fasteners that won't let you down when exposed to moisture, salt, or chemicals. These M6 and M8 Phillips pan head machine screws are made from 316 stainless steel (A4 grade) — the industry standard for corrosion-critical applications.
Each screw is manufactured from A4-grade 316 stainless steel, which contains molybdenum for superior chloride and salt-water resistance compared to standard 304 SS. The pan head profile provides a wide, low-profile bearing surface ideal for sheet metal, enclosures, and structural panels. Thread diameters span M6 (6mm, pitch 1.0mm) and M8 (8mm, pitch 1.25mm), with lengths ranging from 8mm to 80mm — all fully threaded. Available in pack quantities from 1 to 20 pieces to suit repair jobs, prototyping, or small production runs.
Typical applications include marine deck hardware and boat fittings, outdoor signage and architectural metalwork, food processing and commercial kitchen equipment, HVAC and plumbing panel assembly, and coastal or high-humidity industrial installations where carbon steel fasteners would corrode within months.
| Type | Pan Head Machine Screw (Fully Threaded) |
|---|---|
| Drive Style | Phillips (PH3) |
| Thread Sizes | M6, M8 (ISO Metric) |
| Available Lengths | M6: 8–60mm | M8: 16–80mm |
| Thread Pitch | M6: 1.0mm | M8: 1.25mm |
| Head Diameter | M6: ~10.1mm | M8: ~13.0mm |
| Head Height | M6: ~3.4mm | M8: ~4.3mm |
| Material | 316 Stainless Steel (A4 Grade) |
| Finish | Natural Stainless (Bright Silver) |
| Corrosion Rating | A4 — suitable for marine and outdoor use |
| System of Measurement | Metric |
| Pack Quantities | 1, 2, 5, 7, 10, 20 pcs |
The first number is the thread diameter (M6 = 6mm, M8 = 8mm) and the second number is the shank length measured from under the head. All screws in this listing are fully threaded.
316 stainless steel (A4 grade) contains molybdenum, which significantly improves resistance to chlorides, salt water, and acidic environments. It is the preferred choice for marine, coastal, food processing, and chemical applications where 304 may corrode prematurely.
Yes. All M6 and M8 pan head machine screws in this listing are fully threaded from tip to head, making them suitable for thin materials and short blind holes.
These screws use a Phillips drive. A PH3 bit is typically used for M6 and M8 sizes. A power driver is recommended for longer lengths to ensure consistent torque.
Yes. 316 stainless steel (A4) is specifically rated for marine and outdoor use. It resists salt spray, humidity, and mild chemical exposure far better than standard 304 or carbon steel fasteners.
The screw should engage at least 1.5x the thread diameter into the receiving material. For M6, aim for at least 9mm of thread engagement; for M8, at least 12mm. Measure your material stack-up before selecting a length.
M6 pan head: diameter ~10.1mm, height ~3.4mm, thread pitch 1.0mm. M8 pan head: diameter ~13.0mm, height ~4.3mm, thread pitch 1.25mm.
316 stainless steel is highly corrosion-resistant and will not rust under normal indoor, outdoor, or marine conditions. Surface discoloration from heat or contact with dissimilar metals is possible but does not indicate structural failure.
