S-93181A003 4-40 ASME B18.2.2 Hex Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance from 6061 aluminum construction for extended service life in demanding environments
• Precise Class 2B thread fit ensures smooth assembly and reliable fastening performance
• Coarse UNC threading provides faster installation and reduced cross-threading risks
• ASME B18.2.2 compliance guarantees dimensional accuracy and interchangeability
• Standard external hex drive offers compatibility with common wrenching tools
• Compact 1/4" width and 3/32" height delivers space-saving advantages in tight assemblies
• Environmental compliance with RoHS 3 and REACH regulations for global market acceptance

Professional Applications & Engineering Value

This 4-40 UNC hex nut manufactured from 6061 aluminum addresses critical needs in precision assembly applications where weight reduction and corrosion resistance are paramount. The Class 2B thread fit with coarse thread spacing ensures rapid installation while maintaining vibration resistance in equipment, electronics, and aerospace components. The external hex drive design provides superior torque transmission for secure fastening operations. As an ASME B18.2.2 compliant component, it delivers consistent performance in industrial fastening systems requiring reliable, lightweight solutions that meet rigorous engineering standards.

Specification Summary & Compliance

This hex nut features Class 2B thread fit with 4-40 UNC coarse threads and right-hand thread direction. Manufactured to ASME B18.2.2 specifications with standard external hex drive profile. Dimensions include 1/4" width and 3/32" height in inch measurement system. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations.