S-91185A921 1/4"-20 x 3/4" Thumb Screws

Key Features & Benefits at a Glance

• Corrosion-resistant 18-8 stainless steel construction ensures long-term reliability in demanding environments
• Comfortable black acetal plastic head provides secure grip without tools for quick manual adjustments
• Precision Class 3A thread fit delivers superior engagement and vibration resistance in assembly applications
• UNC coarse threading enables faster installation and reduced cross-threading risks
• Two-arm head design offers optimal torque application and ergonomic handling
• Wide temperature tolerance (32° to 180°F) maintains performance across various operating conditions
• Full threading along 3/4" length provides maximum fastening flexibility and holding power

Professional Applications & Engineering Value

Engineered for industrial applications requiring frequent adjustments and reliable fastening, this 1/4"-20 thumb screw combines the corrosion resistance of 18-8 stainless steel with the durability of a black acetal plastic head. The UNC coarse thread configuration ensures rapid installation in metal, plastic, and composite materials, while the Class 3A thread fit maintains precise tolerances for vibration-prone environments. Ideal for access panels, machine guards, and electronic enclosures where tool-less operation is essential, this two-arm thumb screw withstands repeated use without compromising performance. The fully threaded design allows for adjustable positioning while the temperature-stable components ensure consistent operation across industrial settings.

Specification Summary & Compliance

This thumb screw features 1/4"-20 UNC coarse threads with Class 3A fit for precision engagement, manufactured to exacting dimensional standards. The assembly complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material transparency. Right-hand threading and full 3/4" length provide standardized installation across compatible applications.