S-91746A776 1/4"-20 x 2 1/2" Thumb Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and long-term reliability.
• Exceptional mechanical strength offering 80,000 psi tensile strength and Rockwell B83 hardness for heavy-duty, high-stress applications.
• Effortless hand-tightening and loosening thanks to the knurled round head design, providing a secure grip without tools.
• Reliable and quick fastening with UNC coarse threading and Class 2A thread fit, ensuring consistent engagement and reduced cross-threading risk.
• Optimized low-profile head for use in confined spaces where standard screw heads may not fit.
• Versatile partial threading allowing for precise adjustment and secure clamping on a variety of materials.
• Compliance with major environmental regulations including RoHS 3 and REACH, ensuring safety and suitability for global markets.

Professional Applications & Engineering Value

This 1/4"-20 low profile thumb screw is engineered to solve common industrial fastening challenges, such as the need for tool-free assembly and disassembly in hard-to-reach areas. The 18-8 stainless steel material provides excellent resistance to rust and corrosion, making it suitable for outdoor equipment, marine applications, and food processing machinery. The knurled head ensures a firm grip even with greasy or gloved hands, enhancing operator efficiency and safety. Its UNC coarse threads and Class 2A thread fit deliver reliable performance in wood, metal, and plastic assemblies, reducing installation time and minimizing the risk of thread damage. Ideal for use in electronic enclosures, machinery panels, and prototyping, this screw offers a durable, user-friendly fastening solution that withstands repetitive use and demanding conditions.

Specification Summary & Compliance

This thumb screw features precise Class 2A thread fit and UNC coarse threading (1/4"-20) with a thread length of 2 3/8" and overall length of 2 1/2". It is manufactured from 18-8 stainless steel and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for various industrial and consumer applications.