S-99612A110 5/16"-18 Hex Nuts
Hex Nuts
Image may differ from product. See technical specification for details.
Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Finish & Compliance Parameters
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Enhanced corrosion resistance through zinc-plated steel construction, extending service life in demanding environments
- Superior strength for heavy-duty applications with Grade 5 steel meeting rigorous mechanical performance standards
- Secure left-hand thread engagement preventing loosening in counter-rotational machinery and specialized equipment
- Optimized clearance in confined spaces thanks to the thin hex profile requiring less axial room
- Reliable coarse thread performance with UNC 5/16"-18 threads ensuring rapid assembly and vibration resistance
- Precise Class 2B thread fit providing consistent clamping force and reducing cross-threading risks
- Compliance with global environmental standards including RoHS 3 and REACH for safe, sustainable industrial use
Professional Applications & Engineering Value
This Grade 5 zinc-plated steel thin hex nut delivers critical engineering solutions where standard right-hand threads are unsuitable. Its left-hand UNC coarse thread design is essential for rotating components that naturally torque in a reverse direction, preventing accidental disassembly in machinery shafts, mixer blades, and automotive systems. The zinc plating provides a sacrificial layer that significantly enhances corrosion resistance in humid or outdoor industrial settings, reducing maintenance frequency. The thin hex nut profile is engineered for applications with limited wrench clearance without compromising the high tensile strength of Grade 5 steel, making it ideal for compact assemblies in construction, manufacturing, and transportation equipment where space optimization and reliable, long-term fastening are paramount.
Specification Summary & Compliance
This fastener features a 5/16"-18 UNC coarse thread with Class 2B thread fit for consistent engagement, manufactured to inch system standards. Dimensions include a 1/2" width across flats and 3/16" height. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety requirements for industrial components.
