S-90078A120 5/16"-18 Tamper Resistant Nuts

Key Features & Benefits at a Glance

• Enhanced tamper resistance with drilled spanner design requiring specialized tools for installation and removal, preventing unauthorized access in critical applications
• Reliable corrosion protection through zinc alloy construction, ensuring long-term durability in harsh industrial environments
• Secure fastening performance with Class 2B thread fit providing optimal engagement while maintaining easy assembly
• Broad compatibility with 5/16"-18 UNC coarse threads, making it suitable for standard industrial equipment and machinery
• Consistent right-hand threading for intuitive installation following conventional fastening practices
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for safe use in regulated industries
• Optimized dimensions (1" diameter × 1/4" height) balancing security requirements with space constraints in assembly designs

Professional Applications & Engineering Value

This 5/16"-18 UNC tamper resistant nut delivers critical security solutions where unauthorized tampering poses operational risks. The zinc alloy construction provides essential corrosion resistance for outdoor equipment, public infrastructure, and industrial machinery exposed to environmental elements. The drilled spanner drive style specifically addresses vandalism concerns in public access areas, transportation systems, and utility installations by requiring proprietary tools for service access. With coarse UNC threads and Class 2B thread fit, this security nut maintains reliable engagement while accommodating minor misalignments in field installations. The right-hand threading ensures compatibility with standard fastening procedures, making it ideal for maintenance teams requiring both security and efficiency in their operations.

Specification Summary & Compliance

This tamper resistant nut features precision 5/16"-18 UNC coarse threads with Class 2B thread fit per ASME B1.1 standards, ensuring consistent performance across industrial applications. The inch-system specifications include 1" diameter and 1/4" height dimensions with right-hand thread direction. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted substances for workplace safety and environmental protection.