S-90100A103 3/8"-16 Cap Nuts

Key Features & Benefits at a Glance

• Maximum Load-Bearing Capacity: Grade 8 strength classification ensures reliable performance under high tensile and vibration loads, preventing joint failure in demanding applications.
• Superior Corrosion Resistance: Zinc-plated steel construction provides a durable barrier against rust and environmental degradation, extending service life in harsh industrial settings.
• Secure, High-Torque Installation: External hex drive design allows for precise application of torque with standard wrenches, ensuring consistent clamping force without slippage.
• Optimized Thread Engagement: 3/8"-16 UNC coarse threads with Class 2B fit facilitate faster assembly and reduce cross-threading risks, improving installation efficiency.
• Enhanced Safety & Clean Finish: Cap nut profile fully encloses bolt ends, protecting threads and eliminating sharp protrusions for improved workplace safety.
• Regulatory Compliance Assurance: RoHS 3 (2015/863/EU) compliance with exemption demonstrates adherence to environmental standards for global industrial supply chains.
• Dimensional Precision: Standard 9/16" width and 5/8" height maintain interchangeability with existing fastener systems, reducing compatibility issues.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this Grade 8 cap nut addresses critical challenges in machinery assembly, structural frameworks, and equipment manufacturing. The zinc-plated steel construction combats corrosion in humid or chemically aggressive environments, while the 3/8"-16 UNC coarse threads with Class 2B fit ensure rapid, secure fastening even where vibration-induced loosening is a concern. The external hex drive enables high-torque installation with common tools, making it ideal for construction equipment, automotive systems, and manufacturing fixtures where disassembly for maintenance is frequent. By combining high-strength performance with regulatory compliance, this fastener delivers both mechanical reliability and supply chain compatibility for professional users.

Specification Summary & Compliance

This cap nut features precision 3/8"-16 UNC coarse threads with Class 2B thread fit per ASME B1.1 standards, ensuring consistent engagement and interchangeability. Manufactured from zinc-plated steel with dimensions of 9/16" width and 5/8" height, it maintains Grade 8 strength classification for heavy-duty applications. The product is RoHS 3 (2015/863/EU) compliant with exemption 6(a)-I for lead as an alloying element in steel, meeting international environmental regulations while delivering reliable mechanical performance.