S-90257A005 4-40 Hex Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh environments and extended service life
• Reliable coarse thread engagement with UNC specification for faster assembly and reduced cross-threading risk
• Precise Class 2B thread fit ensures smooth installation and consistent clamping force in industrial applications
• Standard external hex design provides excellent tool grip and torque transmission for secure fastening
• Right-hand thread direction offers compatibility with standard assembly procedures and common hardware
• Compact 1/4" width and 3/32" height delivers space-efficient performance without compromising strength
• Full regulatory compliance with RoHS 3 and REACH standards for safe, environmentally responsible sourcing

Professional Applications & Engineering Value

Engineered for demanding industrial environments, this 4-40 UNC hex nut in 316 Stainless Steel provides exceptional resistance to chemicals, saltwater, and extreme temperatures. The coarse thread spacing and Class 2B thread fit enable rapid installation in high-volume assembly lines while maintaining vibration resistance. Its standard external hex profile ensures compatibility with common wrenches and automated equipment, making it ideal for machinery, marine hardware, chemical processing equipment, and infrastructure projects where corrosion resistance and long-term reliability are critical.

Specification Summary & Compliance

This hex nut features 4-40 UNC coarse threads with Class 2B thread fit for consistent dimensional accuracy. Manufactured to inch system standards with 1/4" width and 3/32" height. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to industrial safety and environmental standards.