S-91185A967 5/16"-18 x 1 1/2" Thumb Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction for long-lasting performance in demanding environments
• Excellent grip and torque application thanks to the two-arm acetal plastic head design for hand-tightening without tools
• Precise thread engagement with Class 3A UNC coarse threading ensuring reliable fastening and vibration resistance
• Durable plastic head made from black acetal material offering chemical resistance and comfortable handling
• Wide temperature tolerance with head operating range from 32° to 180° F for various industrial settings
• Full threading along 1½" length provides consistent holding power and flexibility in adjustment depth
• Regulatory compliance with RoHS 3 and REACH standards for safe use in regulated industries

Professional Applications & Engineering Value

This 5/16"-18 thumb screw combines the strength of 18-8 stainless steel with the ergonomic benefits of a black acetal plastic head, making it ideal for frequent-adjustment applications in machinery, electronics enclosures, and assembly jigs. The two-arm design enables quick hand-tightening where tool access is limited, while the Class 3A UNC coarse threads resist loosening under vibration—common in industrial environments. Its fully threaded 1½" length allows for secure fastening at various depths, and the corrosion-resistant material ensures reliability in humid or washdown conditions, reducing maintenance cycles and downtime.

Specification Summary & Compliance

This thumb screw features 5/16"-18 UNC coarse threads with Class 3A thread fit for precise dimensional accuracy, manufactured in the inch system. It is fully threaded and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards for industrial components.