S-90866A030 5/16"-18 Thumb Nuts

Key Features & Benefits at a Glance

• Effortless hand-tightening with standard wing profile for quick assembly and disassembly without tools
• Superior corrosion resistance through zinc-plated steel construction in demanding industrial environments
• Reliable coarse thread engagement with 5/16"-18 UNC threads providing faster installation and reduced cross-threading risk
• Precise thread compatibility ensured by Class 2B fit for consistent performance with matching male threads
• Optimized grip surface with 1 1/4" width and 5/8" height for secure handling even with gloves
• Durable right-hand threading conforming to industry standards for universal application compatibility
• Environmental compliance meeting RoHS 3 standards for safe use in regulated industries

Professional Applications & Engineering Value

This zinc-plated steel thumb nut delivers exceptional value in applications requiring frequent adjustments or tool-free maintenance. The coarse UNC threading (5/16"-18) combined with the standard wing profile enables rapid installation while resisting vibration loosening in machinery, electrical enclosures, and assembly jigs. The 9/16" base diameter provides substantial bearing surface for even load distribution, preventing damage to connected materials. Engineers specify this heavy-duty thumb nut for maintenance panels, adjustable fixtures, and temporary installations where accessibility and corrosion resistance are critical. The right-hand thread direction ensures compatibility with standard components across industrial equipment and manufacturing systems.

Specification Summary & Compliance

Manufactured to precise inch system dimensions with Class 2B thread fit tolerance for reliable engagement with Class 2A external threads. Thread specification conforms to UNC (Unified National Coarse) standards with 5/16"-18 thread size and right-hand direction. Compliant with RoHS 3 (2015/863/EU) regulations, containing no restricted hazardous substances. Base diameter measures 9/16" with overall dimensions of 1 1/4" width and 5/8" height for consistent performance across industrial applications.