S-90181A581 5/16"-18 x 3/4" Thumb Screws

Key Features & Benefits at a Glance

• Easy manual operation with spade head design requiring no tools for quick assembly and disassembly
• Superior durability with steel construction and Rockwell B55 hardness for long-term reliability
• High load capacity with 40,000 psi tensile strength suitable for demanding industrial applications
• Precise thread engagement with Class 2A UNC coarse threads ensuring consistent fit and reduced cross-threading
• Full threading coverage along the 3/4" length provides maximum grip and holding power
• Environmental compliance with RoHS 3 standards for safe use in regulated industries
• Right-hand thread direction following industry standards for intuitive installation

Professional Applications & Engineering Value

This 5/16"-18 UNC thumb screw delivers exceptional engineering value through its steel construction and spade head design, specifically engineered to solve common industrial fastening challenges. The combination of Rockwell B55 hardness and 40,000 psi tensile strength ensures reliable performance in high-stress applications where frequent adjustments are necessary. The fully threaded configuration with coarse UNC threads provides superior holding power in machinery, electronic enclosures, and equipment panels that require regular maintenance. The thumb-operated spade head eliminates the need for tools, significantly reducing downtime during assembly and disassembly cycles while maintaining secure fastening in vibration-prone environments.

Specification Summary & Compliance

This thumb screw features precise 5/16"-18 UNC coarse threads with Class 2A thread fit tolerance for consistent engagement and reliable performance. The product maintains dimensional accuracy with a 3/4" length and fully threaded configuration. Manufacturing complies with RoHS 3 (2015/863/EU) environmental regulations, ensuring suitability for various industrial applications requiring compliant components.