S-90576A822 M20 DIN 985, ISO 10511 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through precision-engineered nylon insert that maintains secure locking under dynamic loads
• Enhanced corrosion protection with zinc yellow-chromate plating on steel construction for extended service life in harsh environments
• High-temperature performance capable of withstanding up to 220°F while maintaining locking integrity
• Exceptional strength rating with Class 8 designation ensuring reliable performance in demanding applications
• Global compatibility through compliance with both DIN 985 and ISO 10511 international standards
• Easy installation and removal with standard external hex drive design and coarse M20 x 2.5mm thread profile
• Precision thread fit with Class 6H tolerance ensuring smooth engagement and consistent performance

Professional Applications & Engineering Value

This M20 nylon insert lock nut delivers critical vibration-resistant fastening solutions for industrial applications where safety and reliability are paramount. The zinc yellow-chromate plated steel construction provides excellent corrosion resistance, making these metric hex locknuts ideal for automotive assemblies, heavy machinery, and construction equipment exposed to harsh environmental conditions. The nylon locking element creates consistent friction against bolt threads, preventing loosening from vibration and thermal cycling while allowing for multiple reuses. With a maximum temperature rating of 220°F, these Class 8 locknuts maintain their locking performance in elevated temperature applications, offering engineers a dependable solution for critical joints in manufacturing, transportation, and industrial maintenance scenarios.

Specification Summary & Compliance

This locknut features M20 x 2.5mm coarse metric threads with Class 6H thread fit tolerance for precision engagement. Manufactured to DIN 985 and ISO 10511 international standards, the nut maintains dimensional accuracy and performance consistency. The external hex drive with standard 30mm width and 20mm height profile ensures compatibility with common wrenching tools. Constructed from zinc yellow-chromate plated steel with Class 8 strength rating, this locking fastener meets industry requirements for mechanical performance and environmental compliance.