S-90670A267 3/4"-20 ASME B18.2.2 Hex Nuts
Hex Nuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior corrosion resistance from 6061 aluminum construction for extended service life in demanding environments
- Exceptional vibration resistance due to UNEF extra fine thread design that maintains secure fastening under dynamic loads
- Precise thread engagement with Class 2B fit ensuring reliable, consistent performance in critical assemblies
- Industry-standard compatibility through ASME B18.2.2 compliance for seamless integration with existing systems
- Enhanced torque transmission via external hex drive design that accommodates standard wrenching tools
- Environmental compliance assurance meeting both REACH and RoHS 3 standards for global manufacturing applications
- Optimized strength-to-weight ratio from aluminum construction reducing overall assembly weight without compromising durability
Professional Applications & Engineering Value
This 3/4"-20 UNEF thread hex nut delivers critical engineering advantages through its 6061 aluminum construction and extra fine thread spacing. The combination provides exceptional resistance to loosening under vibration, making it ideal for precision machinery, aerospace components, and automotive systems where maintaining clamp load is essential. The Class 2B thread fit ensures consistent engagement with mating components while the standard hex profile accommodates conventional tooling. As an ASME B18.2.2 compliant fastener, it offers reliable performance in structural assemblies, electronic enclosures, and transportation equipment where weight reduction and corrosion resistance are paramount considerations.
Specification Summary & Compliance
Manufactured to ASME B18.2.2 standards with Class 2B thread fit tolerance for precision assembly. Features 3/4"-20 UNEF extra fine threads with right-hand direction in inch measurement system. Dimensions include 1-1/8" width and 41/64" height with standard hex nut profile and external hex drive. Fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental regulations including exemption 6(b)-II for lead as an alloying element in aluminum machining applications.
