S-94450A531 7/8"-20 ANSI/ASME 18.2.2 Hex Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel construction, ideal for harsh environments and extended service life
• Enhanced thread engagement and vibration resistance due to the UNEF (Extra Fine) thread spacing
• Reliable, precision fit ensured by the Class 2B thread fit for consistent assembly performance
• Space-saving and lightweight design with a thin profile, perfect for applications with clearance constraints
• Guaranteed mechanical performance and interchangeability through compliance with the ANSI/ASME 18.2.2 standard
• Secure left-hand threading provides a reliable fastening solution for counter-rotating mechanisms
• Environmental and regulatory safety with full compliance to RoHS 3 and REACH regulations

Professional Applications & Engineering Value

This 7/8"-20 UNEF left hand thin hex nut is engineered to address critical challenges in precision assembly and high-vibration environments. The combination of 18-8 stainless steel offers excellent resistance to oxidation and corrosion, making it a durable choice for marine, chemical processing, and outdoor equipment. The extra fine thread spacing provides a greater number of threads per inch compared to standard coarse threads, resulting in superior resistance to loosening under dynamic loads and vibrations. Its thin hex profile is specifically designed for use in confined spaces where a standard nut would not fit, without compromising on the strength required for the application. This nut is an essential industrial fastener for machinery, automotive, and aerospace components that require a reliable, left-hand threaded, and corrosion-resistant solution.

Specification Summary & Compliance

This hex nut features a 7/8"-20 UNEF thread with a left-hand direction and a Class 2B thread fit for consistent, free-spinning assembly. The dimensional profile is a thin hex with a width of 1 5/16" and a height of 31/64". Manufactured in accordance with ANSI/ASME 18.2.2 specifications, it ensures mechanical reliability and interchangeability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to strict environmental and safety standards.