S-98789A110 1/4"-20 Tamper Resistant Nuts

Key Features & Benefits at a Glance

• Enhanced tamper resistance with external square drive design prevents unauthorized removal using standard tools
• Superior corrosion protection through zinc yellow-chromate plating extends service life in harsh industrial environments
• Reliable coarse thread engagement with UNC 1/4"-20 configuration ensures quick installation and vibration resistance
• Precision Class 2B thread fit guarantees consistent performance and secure fastening in critical applications
• Right-hand thread direction provides familiar installation for maintenance personnel while maintaining security features
• Compact 15/64" height profile allows installation in space-constrained applications without compromising strength
• Environmental compliance with RoHS 3 and REACH regulations meets international safety and sustainability standards

Professional Applications & Engineering Value

This tamper resistant nut delivers essential security where vandalism, tampering, or unauthorized access presents operational risks. The zinc yellow-chromate plated steel construction provides exceptional corrosion resistance, making it ideal for outdoor equipment, public infrastructure, and industrial machinery exposed to moisture and chemicals. The external square drive requires specialized tools for installation and removal, effectively deterring tampering while maintaining the reliability of UNC coarse threads for rapid assembly. Engineered with Class 2B thread fit, this security fastener maintains precise tolerances for consistent performance in high-vibration environments like transportation systems, electrical enclosures, and manufacturing equipment where tamper-proof fasteners are critical for safety and operational continuity.

Specification Summary & Compliance

This tamper resistant nut features 1/4"-20 UNC coarse threads with Class 2B thread fit per ASME B1.1 standards, ensuring dimensional accuracy and reliable engagement. The inch-system specifications include 1-3/64" width and 15/64" height for consistent sizing. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted substances and commitment to environmental safety standards for industrial applications.