S-91306A731 M4 x 35 mm ISO 7380 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 140,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Superior corrosion resistance from zinc plating protects against rust and extends service life in harsh industrial environments.
• High hardness rating (Rockwell C32) provides excellent wear resistance, maintaining thread integrity through repeated use.
• Precision Class 6g thread fit guarantees smooth installation and secure fastening with compatible nuts and threaded holes.
• Convenient hex button head design allows for easy installation with standard hex tools while offering a low-profile, rounded finish.
• Full threading along the 35mm length enables maximum grip and adjustment flexibility in assembled components.
• Compliance with international standards including ISO 7380 ensures consistent quality and interchangeability in global projects.

Professional Applications & Engineering Value

These M4 hex button head screws deliver critical engineering value in applications where space constraints and high mechanical demands coexist. The zinc-plated alloy steel construction provides essential corrosion protection for outdoor equipment, automotive assemblies, and machinery exposed to moisture or chemicals. With their Class 10.9 strength rating and 140,000 psi tensile strength, these fasteners prevent joint failure in vibrating environments while the coarse thread pitch ensures rapid installation in production lines. The low-profile rounded head design eliminates snagging hazards in confined spaces while maintaining sufficient torque transmission through the 2.5mm hex drive. Ideal for securing critical components in industrial machinery, transportation equipment, and structural frameworks where reliability cannot be compromised.

Specification Summary & Compliance

This fully threaded metric screw features M4 x 0.7mm coarse threads with Class 6g tolerance for precision fit, 35mm length, and ISO 7380 manufacturing specifications. The fastener meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance requirements for hazardous substance restrictions, ensuring environmental responsibility in industrial supply chains.