ISO 7380-1 M3x5mm (A2-70)

ISO 7380-1 M3 Button Head Socket Screw – A2-70 Stainless Steel

The ISO 7380-1 M3 button head socket screw is a metric machine screw with a low-profile rounded head and an internal hexagon drive. Manufactured from A2-70 stainless steel, it combines good mechanical strength, corrosion resistance and a clean finished appearance.

The rounded button head has a lower profile than a conventional cylindrical socket head, making this screw suitable for assemblies where available space is limited or where a smooth, visually unobtrusive head is preferred. The internal hexagon drive provides secure tool engagement and reliable tightening with a standard hex key.

Key Features

• Manufactured according to ISO 7380-1
• Made from A2-70 stainless steel
• Low-profile rounded button head
• Internal hexagon drive for secure tightening
• Good corrosion resistance in normal indoor and outdoor environments
• Metric coarse thread for compatibility with standard M3 components
• Suitable for repeated assembly and maintenance
• Clean appearance for visible fastening points

Typical Applications

• 3D printers and CNC machines
• Automation and robotics
• Electronic devices and enclosures
• Machine guards, covers and panels
• Light mechanical assemblies
• Furniture and interior fittings
• Laboratory and measuring equipment
• Model building, drones and RC applications
• General engineering and maintenance

Material Information

A2-70 stainless steel is an austenitic stainless-steel fastener grade commonly associated with AISI 304-type stainless steel. It provides good resistance to atmospheric corrosion, humidity and many everyday chemicals.

The A2-70 property class indicates a minimum tensile strength of approximately 700 MPa. A2 stainless steel is suitable for most indoor applications and many outdoor environments, but it is generally not recommended for prolonged exposure to seawater, chlorides or highly aggressive chemicals.

A2 stainless steel is normally considered non-magnetic in its annealed condition, although slight magnetism may occur after cold forming during manufacture.

Compatibility

This screw uses a standard M3 metric coarse thread with a thread pitch of 0.50 mm. It is compatible with corresponding M3 nuts, washers, threaded holes and threaded inserts.

Because the button head is lower and wider than the head of an ISO 4762 socket head cap screw, it offers a smooth appearance and a larger contact surface. However, it is generally intended for applications requiring lower tightening torque than a conventional cylindrical socket head screw.

Technical Specifications

• Standard: ISO 7380-1
• Thread size: M3
• Thread pitch: 0.50 mm
• Thread type: Metric coarse thread
• Head type: Rounded button head
• Drive type: Internal hexagon
• Material: A2 stainless steel
• Property class: A2-70
• Typical stainless-steel designation: AISI 304
• Surface finish: Natural stainless steel

Please refer to the product-specific technical data for the exact screw length, head dimensions, socket size and socket depth.