S-93425A255 7/8"-14 Hex Nuts

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with zinc-plated steel construction for reliable performance in demanding industrial environments
• Precise left-hand thread engagement with Class 2B fit ensuring secure fastening in specialized reverse-thread applications
• Superior torque transmission through standard external hex drive design for easy installation with common tools
• Exceptional durability with Grade 2 strength rating providing reliable performance in various mechanical assemblies
• Optimized fine threading (14 TPI) delivering improved vibration resistance and better load distribution
• Full regulatory compliance meeting RoHS 3 and REACH standards for safe use across multiple industries
• Universal compatibility with standard 1 5/16" wrench size for seamless integration into existing systems

Professional Applications & Engineering Value

This 7/8"-14 UNF left-hand thread hex nut delivers critical engineering solutions where reverse-direction threading prevents loosening from rotational forces. The zinc-plated steel construction provides essential corrosion protection for industrial equipment, machinery, and automotive applications exposed to harsh conditions. The fine thread spacing (14 TPI) offers superior vibration resistance compared to coarse threads, making it ideal for high-stress assemblies where maintaining clamp load is crucial. With its external hex drive and standard profile, installation and removal are streamlined using common wrenching tools, reducing maintenance downtime. This specialized left-hand thread fastener is particularly valuable in rotating systems where conventional right-hand threads would naturally loosen, ensuring operational safety and reliability in conveyor systems, power transmission equipment, and specialized machinery.

Specification Summary & Compliance

This hex nut features 7/8"-14 UNF left-hand fine threading with Class 2B thread fit per UNF standards, ensuring precise engagement with mating components. Dimensions include 1 5/16" width across flats and 3/4" height. Manufactured from Grade 2 steel with zinc plating for corrosion protection. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting current environmental standards for industrial fasteners.