316/A4 Stainless Metric Button Head Socket Cap Screws

316 Stainless Steel (A4) ISO 7380 Metric Button Head Socket Cap Screws

When you need a clean, low profile fastener with high strength and corrosion resistance, ISO 7380 Button Head Socket Cap Screws are the professional solution. These fasteners feature a smooth domed button head with an internal hex or Allen socket drive, providing both a refined appearance and excellent torque capability.

These fasteners are also commonly referred to as button head machine screws, which is exactly what they are. They are fully threaded, precision made fasteners designed to be used in tapped holes or with nuts in mechanical and structural assemblies.

Our ISO 7380 Button Head Socket Cap Screws are manufactured from A4 grade 316 stainless steel, making them ideal for marine, coastal, and washdown environments where corrosion resistance is critical.

The button head profile provides a wide bearing surface and low head height, which makes these screws ideal where clearance, snag resistance, or appearance matters, including:

• Marine hardware and deck fittings
• Boat interiors and trim
• Electronics enclosures and control panels
• Architectural and decorative metalwork
• Machinery guards and access covers
• Automotive and motorcycle components

The hex or Allen drive allows high installation torque while maintaining a smooth finished head that will not catch lines, clothing, or wiring.

Why ISO 7380 Matters

ISO 7380 defines the head diameter, head height, socket size, and thread geometry so that these button head socket cap screws fit and perform consistently across all sizes. These are not generic button head screws. They are precision metric machine screws designed for accurate fit in metric threads and with metric tools.

This standard ensures predictable clamping force, proper socket engagement, and uniform appearance across professional installations.

Material: A4 / 316 Stainless Steel

These screws are made from A4 stainless steel, also known as 316, the preferred alloy for saltwater and corrosive environments.

• Exceptional resistance to rust and pitting
• Highly resistant to saltwater and chlorides
• Strong and durable under load
• Long service life outdoors and in wet environments
• Non-magnetic in most conditions

This is the same stainless used in marine fittings, fasteners, and offshore hardware, and it far outperforms A2 stainless in coastal exposure.