S-99612A260 9/16"-18 Hex Nuts
Hex Nuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior corrosion resistance with zinc-plated steel construction, extending service life in harsh industrial environments.
- High-strength performance from Grade 5 steel, ensuring reliable load-bearing capacity for demanding applications.
- Secure left-hand thread engagement with UNF fine thread and Class 2B fit, preventing loosening under counter-clockwise rotation.
- Space-saving thin profile design (5/16" height), ideal for assemblies with limited clearance without compromising strength.
- Easy installation and removal using standard 7/8" external hex drive tools, reducing labor time and costs.
- Compliance with environmental regulations including RoHS 3 and REACH, ensuring safe use in regulated industries.
- Precision inch-system threading (9/16"-18 UNF), guaranteeing consistent compatibility with matched left-hand threaded components.
Professional Applications & Engineering Value
This left-hand thread hex nut is engineered to address critical challenges in machinery and equipment where reverse-threaded fastening is essential to prevent unintended loosening from rotational forces. The Grade 5 zinc-plated steel construction delivers excellent tensile strength and corrosion resistance, making it suitable for high-vibration environments like automotive assemblies, rotating shafts, and industrial conveyors. Its thin profile and UNF fine thread design enable secure fits in confined spaces while maintaining structural integrity. By providing reliable left-hand threading solutions, this nut enhances safety and reduces maintenance downtime in applications requiring counter-directional securement.
Specification Summary & Compliance
This fastener adheres to Class 2B thread fit tolerances for consistent engagement and is manufactured to UNF (Unified National Fine) standards. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance requirements, ensuring environmental safety. Dimensions include a 7/8" width and 5/16" height, with precise 9/16"-18 left-hand fine threading for industrial-grade performance.
