S-91290A304 M3.5 x 6 mm ASME B18.3.1M, ASTM A574M Alloy Steel Socket Head Screws
Alloy Steel Socket Head 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 tensile strength of 170,000 psi ensures reliable performance in demanding applications, reducing the risk of fastener failure.
- Superior corrosion resistance from the black-oxide coating extends service life in harsh industrial environments.
- High hardness (Rockwell C37) provides excellent wear resistance, maintaining thread integrity through repeated use.
- Precision Class 4g6g thread fit guarantees consistent engagement and secure fastening in metric assemblies.
- Standard hex socket drive (2.5mm) allows for high torque application and easy installation in confined spaces.
- Fully threaded design offers maximum grip length and uniform clamping force across the entire fastener.
- Compliance with international standards including ASME B18.3.1M ensures dimensional accuracy and interchangeability.
Professional Applications & Engineering Value
These Class 12.9 alloy steel socket head cap screws deliver critical performance in precision engineering applications where failure is not an option. The combination of black-oxide surface treatment and high tensile strength makes them ideal for automotive components, industrial machinery, and heavy equipment subjected to vibration and dynamic loads. The M3.5 coarse thread configuration provides excellent engagement in both metals and engineered plastics, while the fully threaded design ensures maximum thread contact in tapped holes. Engineered to withstand extreme conditions, these metric socket screws solve common industrial challenges including corrosion-induced degradation, thread stripping under load, and installation accessibility issues in compact assemblies.
Specification Summary & Compliance
Manufactured to precise Class 4g6g thread fit tolerances per metric standards, these screws feature M3.5 x 0.6mm coarse threads with right-hand orientation. The 6mm length and standard socket head profile ensure dimensional consistency across applications. Compliance includes ASME B18.3.1M manufacturing specifications, RoHS 3 (2015/863/EU) environmental directives, and REACH (EC 1907/2006) substance restrictions, confirming they meet global regulatory requirements for industrial use.
