S-90670A252 1/2"-28 ASME B18.2.2 Hex Nuts

Key Features & Benefits at a Glance

• Superior vibration resistance from extra fine UNEF threads that maintain secure connections in high-frequency applications
• Excellent corrosion resistance provided by 6061 aluminum construction for long-lasting performance in harsh environments
• Precise thread engagement with Class 2B fit ensuring reliable, consistent fastening without cross-threading issues
• Industry-standard compatibility through ASME B18.2.2 compliance for seamless integration with existing systems
• Optimal torque transmission via standard external hex design that accommodates common wrenching tools
• Environmental compliance assurance with RoHS 3 and REACH certifications for global manufacturing applications
• Lightweight durability combining aluminum's strength-to-weight ratio with robust 3/4" width and 7/16" height dimensions

Professional Applications & Engineering Value

This 6061 aluminum hex nut with 1/2"-28 UNEF extra fine thread delivers exceptional performance in precision engineering applications where vibration resistance and fine adjustment capabilities are critical. The extra fine thread spacing provides superior holding power in aerospace components, optical equipment, and precision instrumentation where standard threads would compromise accuracy. The external hex drive style ensures reliable torque application using standard tools, while the Class 2B thread fit guarantees consistent engagement without binding. Manufactured from 6061 aluminum, these nuts offer excellent corrosion resistance while reducing overall assembly weight, making them ideal for applications balancing strength requirements with weight constraints. The combination of ASME B18.2.2 compliance and fine thread design addresses common industrial challenges of maintaining secure connections in high-vibration environments while enabling precise positional adjustments.

Specification Summary & Compliance

This hex nut features precision Class 2B thread fit with 1/2"-28 UNEF extra fine threads in right-hand direction, manufactured to ASME B18.2.2 specifications. The standard hex profile measures 3/4" across flats with 7/16" height. The component is fully RoHS 3 compliant with exemption 6(b)-II for lead as an alloying element in aluminum, and REACH compliant per EC 1907/2006 (233 SVHC as of 01/17/2023), ensuring environmental regulation adherence for industrial and commercial applications worldwide.