S-91239A129 M3 x 40 mm ISO 7380 Steel Button Head Hex-Drive Screws
Steel Button Head Hex-Drive Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional corrosion resistance from the black-oxide coating on alloy steel, ideal for harsh industrial environments
- Superior strength and reliability with a Class 10.9 rating and 140,000 psi tensile strength for demanding applications
- Secure and stable fastening ensured by the Class 6g thread fit and fully threaded M3 x 0.5mm coarse thread design
- High durability and wear resistance thanks to Rockwell C32 hardness, extending service life under load
- Easy installation and removal with the 2 mm hex drive and rounded button head, reducing assembly time
- Broad compatibility and standardization through compliance with ISO 7380, ensuring precise dimensions and performance
- Environmentally safe usage as it meets RoHS 3 and REACH regulations, supporting sustainable operations
Professional Applications & Engineering Value
This M3 button head screw is engineered to address critical challenges in industrial assembly, such as vibration loosening and corrosion-induced failure. Made from black-oxide alloy steel, it provides a protective layer that minimizes rust in humid or chemically exposed settings, reducing maintenance costs. The fully threaded design and coarse metric thread ensure rapid, secure fastening in materials like metals and plastics, while the hex drive and rounded head facilitate tool access in confined spaces. With a high tensile strength of 140,000 psi, it reliably supports heavy-load applications in machinery, automotive, and electronics, enhancing structural integrity and operational safety.
Specification Summary & Compliance
This fastener features precise Class 6g thread fit and metric coarse threading (M3 x 0.5mm) per ISO standards, ensuring dimensional accuracy and interchangeability. It adheres to ISO 7380 for head and drive specifications, and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances for safe industrial use.
