S-91880A035 M4 DIN 1587 Cap Nuts

Key Features & Benefits at a Glance

• Complete thread protection with a closed-end cap design that prevents contamination and enhances component longevity in harsh environments.
• Superior corrosion resistance from zinc-plated steel construction, ensuring reliable performance and reduced maintenance in industrial settings.
• Secure and precise fastening with a Class 6H thread fit, providing excellent engagement and vibration resistance for stable assemblies.
• Easy installation and removal using standard external hex drive tools, speeding up assembly processes and reducing labor time.
• High mechanical strength from metric coarse threading (0.7 mm pitch), offering robust load distribution and resistance to loosening under stress.
• Regulatory compliance assurance with REACH and RoHS 3 certifications, meeting strict environmental and safety standards for global supply chains.
• Optimized dimensions (7 mm width, 8 mm height) for space-efficient designs while maintaining a deep 5.3 mm thread depth for strong hold.

Professional Applications & Engineering Value

This M4 cap nut is engineered to address common industrial fastening challenges, such as exposure to moisture, dust, and mechanical vibrations. The zinc-plated steel material provides a durable barrier against corrosion, extending service life in automotive, machinery, and outdoor equipment applications. Its coarse metric thread with a 0.7 mm pitch ensures quick assembly and reliable performance in high-vibration environments, reducing the risk of thread stripping or loosening. Compliant with DIN 1587, this nut delivers consistent quality and fit, making it ideal for precision assemblies requiring external hex drive convenience and Class 6H thread fit accuracy. By integrating these features, it minimizes downtime and enhances the durability of critical fastening points.

Specification Summary & Compliance

This cap nut adheres to DIN 1587 standards, with a Class 6H thread fit for precise metric threading (M4 x 0.7 mm coarse pitch). It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring environmental safety. Dimensions include a 7 mm width, 8 mm height, and 5.3 mm thread depth for accurate integration into industrial assemblies.