S-91510A169 5/16"-18 x 3/4" Thumb Screws

Key Features & Benefits at a Glance

• Easy manual operation with large 0.68" wing head for quick tool-free tightening and adjustments
• Enhanced corrosion resistance from zinc-plated steel construction for reliable performance in industrial environments
• Superior grip and vibration resistance thanks to UNC coarse thread design that prevents loosening under stress
• Precise thread engagement with Class 2A thread fit ensuring consistent installation and load distribution
• Maximum fastening coverage through fully threaded design for secure connections across the entire 3/4" length
• Right-hand threading compatibility with standard assembly procedures for intuitive installation
• Environmental compliance assurance meeting RoHS 3 and REACH regulations for safe, sustainable manufacturing

Professional Applications & Engineering Value

This zinc-plated steel thumb screw delivers exceptional value in applications requiring frequent adjustments or tool-free operation. The wing head design provides substantial surface area for comfortable manual tightening, eliminating the need for specialized tools in maintenance panels, access covers, and machinery guards. The UNC coarse thread pattern combined with Class 2A thread fit ensures rapid installation while maintaining precise alignment in metal, wood, and composite assemblies. The zinc plating offers reliable corrosion protection for industrial environments where exposure to moisture or chemicals is a concern. As a fully threaded thumb screw, it provides consistent clamping force across the entire engagement length, making it ideal for electronic enclosures, production jigs, and equipment where repeated access is necessary without compromising fastener integrity.

Specification Summary & Compliance

This thumb screw features 5/16"-18 UNC coarse threads with Class 2A thread fit tolerance for reliable engagement in standard applications. The fastener maintains dimensional accuracy with a head diameter of 0.68" (tolerance: -0.06" to 0") and overall length of 3/4". Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring restricted substance compliance for global industrial applications.