S-91239A156 M4 x 30 mm ISO 7380 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with black-oxide coating, extending service life in harsh environments
• High tensile strength of 140,000 psi ensures reliable fastening under heavy loads and vibrations
• Class 10.9 strength grade provides superior mechanical performance for critical industrial applications
• Fully threaded M4 x 0.7mm coarse pitch design delivers maximum grip and faster installation
• Hex drive (2.5mm) with button head profile allows for easy tool access and flush mounting
• Rockwell C32 hardness maintains thread integrity and prevents stripping during repeated use
• Compliance with ISO 7380, RoHS 3, and REACH guarantees international quality and environmental safety standards

Professional Applications & Engineering Value

This M4 button head screw delivers critical engineering advantages in demanding assembly environments. The black-oxide alloy steel construction provides superior corrosion protection where moisture or chemicals are present, while the Class 10.9 strength rating ensures joint integrity under high stress conditions. The fully threaded metric design with coarse pitch enables rapid installation in machinery, automotive components, and structural frameworks. Its rounded head profile and hex drive facilitate tool access in confined spaces, making it ideal for precision equipment, conveyor systems, and industrial automation where vibration resistance and reliable fastening are paramount.

Specification Summary & Compliance

Manufactured to ISO 7380 standards with Class 6g thread fit for precise dimensional accuracy. The fastener meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance requirements, ensuring environmental safety. Mechanical properties include 140,000 psi tensile strength and Rockwell C32 hardness, validating its suitability for high-performance industrial applications.