S-90636A049 3/8"-16 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance with center lock distorted threads that maintain secure fastening under dynamic loads and harsh conditions.
• Exceptional corrosion protection provided by zinc yellow-chromate plating, extending service life in industrial and outdoor environments.
• High tensile strength from Grade 8 steel construction, ensuring reliable performance in heavy-duty and high-stress applications.
• Precise thread engagement with UNC coarse threads and Class 2B fit, offering easy installation and consistent clamping force.
• Durable external hex drive design for straightforward torque application using standard wrenches, reducing assembly time.
• Permanent locking capability through distorted thread technology, eliminating the need for additional locking devices and reducing part count.
• Wide compatibility with standard 3/8"-16 UNC components, making it ideal for machinery, automotive, and construction assemblies.

Professional Applications & Engineering Value

This Grade 8 heavy-duty locknut is engineered to address critical challenges in high-vibration and high-stress environments, such as industrial machinery, automotive systems, and structural frameworks. The center lock distorted thread design effectively counters loosening caused by dynamic forces, providing a reliable, permanent fastening solution without secondary locking elements. Made from zinc yellow-chromate plated steel, it offers robust corrosion resistance, essential for prolonged exposure to moisture, chemicals, and outdoor conditions. With a UNC coarse thread and Class 2B thread fit, it ensures precise alignment and ease of installation, reducing the risk of cross-threading and enhancing assembly efficiency. Ideal for applications demanding unwavering security, this locknut delivers long-term performance and minimizes maintenance needs in demanding sectors.

Specification Summary & Compliance

This locknut features a 3/8"-16 UNC coarse thread with Class 2B thread fit for dimensional accuracy and reliable engagement. It adheres to standard inch system measurements and is manufactured from Grade 8 steel, ensuring high strength and durability. The product complies with industry specifications for distorted thread locking nuts and includes zinc yellow-chromate plating that meets RoHS and REACH environmental standards for safe use in various industrial applications.