S-90576A817 M12 DIN 985, ISO 10511 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance with a nylon insert that maintains a secure lock under dynamic loads, reducing the risk of loosening in high-stress environments.
• Enhanced corrosion protection from zinc yellow-chromate plating, ensuring long-term durability in harsh industrial or outdoor settings.
• High-temperature tolerance up to 220°F, allowing reliable performance in applications exposed to heat without compromising locking integrity.
• Precision metric threading (Class 6H) for consistent fit and easy installation with M12 coarse threads, minimizing cross-threading and assembly errors.
• Heavy-duty strength (Class 8) that supports high-load requirements in machinery, automotive, and construction applications.
• Compliance with DIN 985 and ISO 10511 standards, ensuring interchangeability, quality consistency, and global engineering acceptance.
• External hex drive design for straightforward wrenching and torque application, speeding up maintenance and assembly processes.

Professional Applications & Engineering Value

This M12 nylon insert lock nut is engineered to address common industrial challenges like vibration-induced loosening and environmental wear. The zinc yellow-chromate plated steel construction provides a robust barrier against moisture and chemicals, extending service life in automotive, machinery, and heavy equipment applications. With a coarse thread pitch of 1.75mm and Class 6H thread fit, it ensures quick, accurate engagement with mating components, reducing installation time and preventing thread damage. The nylon locking element deforms elastically to maintain constant pressure, offering reusable security in assemblies subject to thermal cycling or dynamic stresses up to 220°F, making it a cost-effective solution for maintaining bolt preload and operational safety.

Specification Summary & Compliance

This locknut features M12 metric coarse threads with a 1.75mm pitch and Class 6H thread tolerance for precise fit. It adheres to DIN 985 and ISO 10511 manufacturing standards, ensuring dimensional accuracy and performance reliability. The zinc yellow-chromate plating offers corrosion resistance, while the nut meets common industry requirements for quality and safety, suitable for use in regulated environments. Dimensions include a 19mm width and 12mm height, with a Class 8 strength rating for high mechanical loads.