S-90201A119 1/4"-20 x 2" Extreme-Strength Grade 9 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 180,000 psi ensures reliable performance in heavy-duty applications and prevents fastener failure under extreme loads
• Superior corrosion resistance with zinc yellow-chromate plating protects against rust and extends service life in harsh industrial environments
• High hardness rating of Rockwell C38 provides excellent wear resistance and maintains thread integrity through repeated installations
• Precise Class 2A thread fit guarantees smooth assembly and consistent clamping force in production environments
• UNC coarse threading offers faster installation and reduced cross-threading risk compared to fine thread alternatives
• Partial threading design provides optimal grip length for secure fastening while minimizing material usage and weight
• External hex drive compatibility allows for standard tooling and high torque application without stripping concerns

Professional Applications & Engineering Value

These Grade 9 hex head screws deliver critical engineering solutions for industrial applications demanding maximum reliability. The zinc yellow-chromate plated steel construction addresses corrosion concerns in manufacturing facilities, outdoor equipment, and marine-adjacent environments. The 1/4"-20 UNC coarse thread configuration ensures rapid assembly in production lines while maintaining vibration resistance. With partial threading and external hex drive, these fasteners provide precise clamping control for machinery, structural steel connections, and heavy equipment maintenance. The combination of 180,000 psi tensile strength and Rockwell C38 hardness makes them ideal for high-stress applications where fastener integrity cannot be compromised, reducing maintenance frequency and downtime in industrial operations.

Specification Summary & Compliance

This 1/4"-20 x 2" hex head screw features Class 2A thread fit per UNC standards with coarse thread spacing and right-hand threading. Manufactured to Grade 9 strength specifications with partial threading and minimum thread length of 3/4". Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for industrial use worldwide.