S-99891A170 3/4"-10 Hex Nuts

Key Features & Benefits at a Glance

• Exceptional strength for demanding applications with Grade 8 classification, ensuring reliable performance under high stress and vibration.
• Superior corrosion resistance provided by zinc yellow-chromate plating, extending service life in harsh industrial environments.
• Secure left-hand thread engagement for specialized machinery and equipment where reverse threading prevents loosening.
• Precise Class 2B thread fit ensures smooth assembly and consistent clamping force, reducing installation time and errors.
• Coarse UNC thread design allows for quick installation and removal, ideal for maintenance and heavy-duty applications.
• Standard external hex drive offers compatibility with common tools, facilitating easy tightening in confined spaces.
• Durable steel construction combined with protective plating delivers long-term reliability in extreme conditions.

Professional Applications & Engineering Value

This Grade 8 left hand hex nut is engineered to address critical challenges in heavy machinery, automotive, and construction sectors where standard right-hand threads may loosen under counter-clockwise rotation. The zinc yellow-chromate plated steel construction provides a robust barrier against rust and corrosion, making it suitable for outdoor or high-moisture environments. Its 3/4"-10 UNC coarse thread and Class 2B fit ensure reliable engagement with mating components, reducing the risk of thread stripping and improving safety in industrial fastening applications. By offering high tensile strength and reverse threading capabilities, this nut prevents unintended disassembly in equipment like mixers, presses, and rotating shafts, delivering enhanced operational security and reduced maintenance downtime.

Specification Summary & Compliance

This hex nut adheres to UNC thread standards with a Class 2B thread fit for consistent dimensional accuracy. Manufactured from high-strength steel and finished with zinc yellow-chromate plating, it meets industry requirements for corrosion protection. The product conforms to Grade 8 strength specifications and is suitable for use in systems requiring left-hand thread fasteners. It complies with relevant industrial standards for inch system fasteners and is produced in accordance with quality assurance protocols, though specific certifications like RoHS or REACH should be verified per batch.