S-91819A120 5/16"-18 ASME B1.1, ASME B18.2.2, SAE J995 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
- High tensile strength with Grade 8 classification ensures reliable performance in demanding applications, reducing failure risks
- Corrosion-resistant zinc yellow-chromate plating extends service life in harsh industrial environments, minimizing maintenance needs
- UNC coarse threading provides faster assembly and reduced cross-threading, improving installation efficiency
- Class 2B thread fit guarantees consistent engagement with mating components for secure fastening
- Compliance with ASME B18.2.2, ASME B1.1, and SAE J995 standards ensures interchangeability and quality assurance
- External hex drive design allows for standard wrench access, simplifying maintenance and adjustments
- RoHS 3 and REACH compliance meets environmental regulations for safe use in global supply chains
Professional Applications & Engineering Value
This Grade 8 heavy-duty hex nut delivers exceptional reliability in industrial fastening scenarios where vibration resistance and structural integrity are critical. Constructed from zinc yellow-chromate plated steel, it combats corrosion in outdoor or chemically exposed settings, preventing premature degradation. The UNC coarse thread design accelerates installation in machinery, automotive assemblies, and construction equipment, while the Class 2B thread fit maintains precise alignment with bolts to avoid loosening under stress. Engineered to meet ASME B18.2.2 and related standards, it provides consistent performance in high-torque applications, reducing downtime and replacement costs for B2B operations.
Specification Summary & Compliance
This hex nut features a 5/16"-18 UNC coarse thread with Class 2B thread fit for standard dimensional accuracy. It adheres to ASME B1.1, ASME B18.2.2, and SAE J995 manufacturing specifications, ensuring uniform quality. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible procurement.
