S-94855A131 5/16"-18 Square Nuts

Key Features & Benefits at a Glance

• Enhanced Grip and Anti-Rotation: Square design provides superior resistance to loosening under vibration, ideal for high-stress industrial environments.
• Robust Material Strength: Made from durable steel, this nut ensures long-term reliability and withstands heavy loads without deforming.
• Quick and Easy Installation: Coarse UNC threading allows for faster assembly compared to fine threads, reducing labor time and effort.
• Precision Thread Fit: Class 2B thread tolerance ensures a secure, reliable connection with mating components, minimizing the risk of cross-threading.
• Wrench-Friendly External Square Drive: The 9/16" width offers multiple flat surfaces for easy wrench access and high-torque tightening.
• Superior Corrosion Resistance: Compliant with RoHS 3 and REACH standards, this nut is suitable for applications requiring environmental safety and material longevity.
• Versatile Right-Hand Threading: Standard right-hand thread direction ensures compatibility with a wide range of common industrial fasteners and equipment.

Professional Applications & Engineering Value

This 5/16"-18 UNC Square Nut is engineered to address common challenges in machinery assembly, structural frameworks, and heavy-duty equipment. The steel construction provides the necessary tensile strength to prevent failure under dynamic loads, while the coarse thread design is less prone to clogging with debris, making it ideal for agricultural, construction, and automotive applications. The external square drive allows for secure wrench engagement, enabling high-torque installation where space is limited. Its Class 2B thread fit guarantees consistent performance with standard bolts, reducing assembly errors and maintenance downtime. By combining durability with compliance to RoHS and REACH standards, this nut offers a reliable, environmentally conscious solution for demanding industrial fastening needs.

Specification Summary & Compliance

This square nut adheres to Unified Coarse (UNC) thread standards with a Class 2B thread fit, ensuring dimensional accuracy and interchangeability. The specified thread size is 5/16"-18 with a coarse thread spacing. Manufacturing complies with industry standards for inch-system fasteners, and the product is certified RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming it is free of restricted hazardous substances and safe for various industrial applications.