M3 A2 Stainless Socket Button Screws ISO 7380-1

Product Description

M3 A2 Stainless Steel Socket Button Head Machine Screws

These M3 socket button head machine screws are manufactured from corrosion-resistant A2 stainless steel and feature a low-profile, rounded head with an internal hexagon socket. The button head provides a neat finished appearance while requiring less vertical clearance than a conventional socket cap screw.

Supplied with a standard M3 metric coarse thread, these screws are suitable for machinery, equipment, electronics, automotive assemblies and general engineering applications where corrosion resistance and a low-profile head are required.

Product Specifications

• Thread size: M3
• Thread pitch: 0.5mm metric coarse
• Material: A2 stainless steel
• Finish: Natural stainless steel
• Head style: Button head
• Drive type: Internal hexagon socket
• Hexagon key size: 2mm
• Maximum head diameter: 5.7mm
• Maximum head height: 1.65mm
• Thread coverage: Fully threaded
• Dimensional standard: ISO 7380-1:2022
• British Standard adoption: BS EN ISO 7380-1:2022
• Former designation: DIN 7380

Length measurement: Button head screw lengths are measured from underneath the head to the end of the screw. The head is not included in the stated length.

Typical Applications

• Machinery and equipment assembly
• Electrical and electronic equipment
• Automotive and motorcycle components
• Panels, guards and enclosures
• Fixtures and lightweight assemblies
• Applications requiring a neat, low-profile head

Reduced Head Loadability

Socket button head screws manufactured to ISO 7380-1 have reduced loadability due to the combination of the shallow button head and internal hexagon socket. The standard assumes head loadability equivalent to approximately 80% of the loadability in the threaded section. They should not be used as direct strength replacements for standard socket cap screws without checking the application requirements.

Installation Information

Install using a correctly fitting 2mm hexagon key and a matching M3 x 0.5 nut or tapped hole. Avoid excessive tightening because the shallow internal socket and reduced head section provide less load capacity than a conventional socket cap screw.

Stainless steel threads can gall or seize, particularly when tightened rapidly. A suitable anti-seize compound is recommended for repeated assembly or higher tightening loads.

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Please note: Specifications are provided as a guide. If dimensions, material properties or standards compliance are critical to your application, please contact us before ordering.

Please Note: Specifications given are intended as a guide only. If critical to your project please check with us first.