S-91185A961 5/16"-18 x 7/8" Thumb Screws

Key Features & Benefits at a Glance

• Effortless manual tightening and loosening with a two-arm thumb head design, eliminating the need for tools in frequent adjustments.
• Superior corrosion resistance from 18-8 Stainless Steel construction, ensuring long-term reliability in demanding environments.
• Durable and impact-resistant head made from black Acetal Plastic, providing a secure grip and maintaining integrity from 32° to 180° F.
• Precise and reliable thread engagement with Class 3A UNC coarse threads, offering excellent vibration resistance and quick assembly.
• Maximum fastening versatility due to the fully threaded right-hand design, allowing for full-length engagement in various applications.
• Compliance with major environmental regulations including RoHS 3 and REACH, ensuring safety and suitability for global industrial use.
• Optimized for high-strength applications with a robust 1 1/2" head width and 13/32" height, delivering superior torque and handling.

Professional Applications & Engineering Value

These 5/16"-18 thumb screws are engineered to solve critical challenges in industrial maintenance, electronics, and machinery assembly. The combination of 18-8 Stainless Steel and a black Acetal Plastic head provides excellent resistance to corrosion, chemicals, and wear, making them ideal for environments where durability and frequent manual adjustments are required. The Class 3A thread fit and coarse UNC threading ensure a secure, vibration-resistant hold, reducing the risk of loosening under dynamic loads. This design is particularly valuable in applications requiring tool-free operation, such as access panels, jigs, and fixtures, where speed and reliability are paramount. By integrating robust materials and precise right-hand thread engineering, these screws enhance operational efficiency and reduce downtime in professional settings.

Specification Summary & Compliance

This product adheres to UNC thread standards with a 5/16"-18 thread size and Class 3A thread fit, ensuring high precision and interchangeability. The fully threaded design and coarse thread spacing provide optimal holding power. Compliance is confirmed with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, affirming the absence of hazardous substances and supporting safe use in industrial applications.