S-98427A300 7/8"-9 ASTM A563 Hex Nuts

Key Features & Benefits at a Glance

• Enhanced load distribution with extra wide profile design, reducing surface pressure and preventing material damage in heavy-duty applications
• Superior strength performance through ASTM Grade DH certification, ensuring reliable performance under high stress conditions
• Secure fastening compatibility with Class 2B thread fit, providing optimal engagement with mating components while maintaining easy assembly
• Durability in demanding environments thanks to robust steel construction, offering excellent resistance to vibration and mechanical stress
• Regulatory compliance assurance with RoHS 3 and REACH standards, making these nuts suitable for global industrial supply chains
• Time-efficient installation with standard UNC coarse threading and external hex drive, enabling quick assembly with common tools
• Precision dimensional consistency maintaining 1 7/16" width and 55/64" height specifications for reliable interchangeability in inch-system applications

Professional Applications & Engineering Value

This heavy-duty hex nut delivers exceptional engineering value through its ASTM A563 Grade DH certification and extra wide profile design. The combination of high-strength steel material and coarse UNC threading addresses critical industrial challenges where vibration resistance and load distribution are paramount. The 7/8"-9 thread size with Class 2B thread fit ensures reliable performance in structural applications, heavy machinery, and construction equipment where joint integrity cannot be compromised. The external hex drive configuration allows for high torque application using standard wrenches, while the substantial 1 7/16" width provides superior bearing surface for distributing clamping forces effectively across connected components.

Specification Summary & Compliance

This hex nut maintains precise Class 2B thread fit tolerances according to UNC coarse thread standards, ensuring consistent performance across industrial applications. Manufactured to ASTM A563 Grade DH specifications for high-strength requirements, the fastener demonstrates full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The dimensional accuracy includes 7/8"-9 thread size with right-hand thread direction and precise measurements of 1 7/16" width and 55/64" height, providing reliable interchangeability within inch-system assemblies.