S-99149A124 5/16"-18 ASME B18.2.2 Hex Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with black protective coating on 6061 aluminum for extended service life in harsh environments
• Reliable thread engagement with Class 2B thread fit ensuring smooth installation and vibration resistance
• Industry-standard compliance with ASME B18.2.2 specifications for consistent performance and interchangeability
• Quick assembly efficiency with coarse UNC threads and right-hand direction for faster installation
• Durable external hex design providing secure wrench grip and torque transmission
• Environmental compliance meeting RoHS 3 and REACH standards for safe industrial use
• Precision dimensional accuracy with 1/2" width and 17/64" height for consistent fit in assembly applications

Professional Applications & Engineering Value

This 5/16"-18 UNC hex nut delivers exceptional value in industrial applications where corrosion resistance and lightweight strength are critical. The black corrosion-resistant coating on 6061 aluminum provides superior protection against environmental factors while maintaining the material's excellent strength-to-weight ratio. The coarse thread design ensures rapid installation in manufacturing lines and maintenance operations, while the Class 2B thread fit guarantees consistent engagement without binding. Ideal for electrical enclosures, marine components, and transportation equipment, this ASME B18.2.2 compliant fastener solves common challenges of galvanic corrosion and weight reduction in aluminum assembly applications.

Specification Summary & Compliance

This standard hex nut features 5/16"-18 UNC coarse threads with Class 2B thread fit tolerance for reliable performance. Manufactured to ASME B18.2.2 specifications with precise dimensions of 1/2" width and 17/64" height. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safe use across various industrial sectors.