S-99612A117 3/8"-16 Hex Nuts

Key Features & Benefits at a Glance

• Enhanced corrosion resistance through zinc plating, extending service life in demanding industrial environments
• Superior load-bearing capacity with Grade 5 strength classification, ensuring reliable performance under high-stress applications
• Space-saving thin profile design (7/32" height) ideal for applications with limited clearance without compromising strength
• Secure anti-loosening performance with left-hand threading, providing counter-rotational security in specific machinery applications
• Quick installation and removal with standard external hex drive and coarse UNC threading, reducing assembly time
• Precise thread engagement with Class 2B fit, ensuring consistent performance and vibration resistance
• Environmental compliance assurance meeting RoHS 3 and REACH standards for global industrial applications

Professional Applications & Engineering Value

This Grade 5 zinc-plated steel thin hex nut with left-hand thread addresses critical engineering challenges in rotating machinery and specialized equipment where reverse-threading prevents accidental loosening. The 3/8"-16 UNC coarse thread configuration provides excellent engagement in softer materials and faster assembly compared to fine threads. The thin hex profile offers significant space savings while maintaining the mechanical strength required for heavy-duty industrial fastening. The zinc plating creates a protective barrier against corrosion, making these left hand thread nuts suitable for automotive, manufacturing, and machinery applications exposed to environmental elements. The combination of Class 2B thread fit and external hex drive ensures reliable torque transmission and consistent clamping force in high-vibration environments.

Specification Summary & Compliance

This thin hex nut features precise 3/8"-16 UNC coarse threading with Class 2B thread fit tolerance, ensuring proper engagement with mating components. Manufactured from Grade 5 steel for consistent mechanical properties, the nut measures 9/16" across flats with a 7/32" height profile. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, making it suitable for regulated industrial applications worldwide. The left-hand thread direction follows standard industrial specifications for specialized fastening requirements.