S-91280A135 M4 x 14 mm ISO 4017, DIN 933, ISO 898 Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional durability with Class 8.8 strength rating and 110,000 psi tensile strength for reliable performance in demanding applications
• Superior corrosion resistance through zinc plating that protects against environmental damage and extends service life
• Optimized thread engagement with M4 x 0.7mm coarse pitch design ensuring secure fastening and vibration resistance
• Easy installation and removal thanks to the external hex drive and standard right-hand threading for efficient assembly
• Precision manufacturing with Class 6h thread fit guaranteeing consistent performance and proper mating with nuts
• Full thread coverage along the entire 14mm length provides maximum holding power and load distribution
• Industry-standard compliance meeting ISO 4017/DIN 933 specifications for guaranteed interchangeability and quality

Professional Applications & Engineering Value

These Class 8.8 steel hex head screws deliver exceptional mechanical performance for industrial applications where reliability is critical. The M4 metric coarse thread configuration with 0.7mm pitch provides superior resistance to loosening under vibration, making them ideal for machinery, equipment assembly, and automotive components. The zinc plated finish creates a protective barrier against corrosion in challenging environments, while the external hex drive allows for high torque application without stripping. With Rockwell C21 hardness and fully threaded design, these fasteners maintain integrity under heavy loads, solving common failure points in industrial fastening systems. Their standardized dimensions ensure perfect compatibility with existing ISO 4017 and DIN 933 compliant components.

Specification Summary & Compliance

These metric hex head screws feature precise Class 6h thread fit tolerance according to ISO metric standards, ensuring proper engagement with mating components. Manufacturing complies with ISO 4017 and DIN 933 specifications for dimensional accuracy and ISO 898 for mechanical properties. The products are fully compliant with RoHS 3 (2015/863/EU) environmental directives and REACH (EC 1907/2006) regulations, meeting the latest substance restriction requirements for industrial applications worldwide.