316/A4 Stainless Metric Socket Head Socket Cap Screws

316 Stainless Steel (A4) DIN 912 Metric Socket Head Cap Screws

When you need maximum strength, precise fit, and corrosion resistance, DIN 912 Socket Head Cap Screws are the industry standard. These fasteners feature a cylindrical head with an internal hex or Allen socket drive, allowing very high tightening torque in compact spaces.

These fasteners are also commonly referred to as socket head machine screws, which accurately describes their function. They are fully threaded machine screws designed for use in tapped holes or with nuts in mechanical, structural, and marine assemblies.

Our DIN 912 socket head cap screws are manufactured from A4 grade 316 stainless steel, making them ideal for saltwater, coastal, and washdown environments where corrosion resistance is critical.

The tall cylindrical head and deep Allen or socket hex drive provide superior engagement with the tool, making these screws ideal for high load and high vibration applications such as:

• Marine hardware and deck fittings
• Engines and mechanical systems
• Machinery and equipment frames
• Automotive and motorsport assemblies
• Industrial and structural applications
• Aluminum, steel, and composite structures

The socket drive allows high torque without damaging the head, making DIN 912 screws a favorite in precision mechanical assemblies.

Why DIN 912 Matters

DIN 912 defines the head diameter, head height, socket size, and thread geometry so that these socket head cap screws fit and perform consistently across all sizes. These are not generic Allen screws. They are precision metric machine screws designed to deliver predictable clamping force and proper fit with metric tools and threads.

Using true DIN 912 fasteners prevents rounding, thread damage, and uneven load that can occur with low tolerance hardware.

Material: A4 / 316 Stainless Steel

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

• Outstanding 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.

When paired with our A4 stainless metric hardware, these socket head machine screws deliver a corrosion resistant fastening system that provides strength, precision, and long term reliability in demanding environments.