S-91746A428 1/4"-20 x 2" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments
• Superior grip and torque application thanks to the knurled head texture, allowing for easy hand-tightening without tools
• Optimized low-profile design provides clearance in tight spaces while maintaining a robust round head shape
• High mechanical strength with 80,000 psi tensile strength and Rockwell B83 hardness for reliable, heavy-duty use
• Precise thread engagement with Class 2A UNC coarse threads ensuring consistent fit and reduced cross-threading risk
• Versatile partial threading allows for secure fastening while accommodating various material thicknesses
• Regulatory compliance with RoHS 3 and REACH standards, ensuring safety and environmental responsibility

Professional Applications & Engineering Value

This 1/4"-20 knurled thumb screw is engineered to solve critical assembly challenges in industrial settings. The 18-8 Stainless Steel material provides excellent corrosion resistance, making it suitable for applications in electronics, machinery, and outdoor equipment where moisture or chemicals are present. The low-profile round head with knurled texture ensures maximum torque application without specialized tools, speeding up maintenance and reducing downtime. Its UNC coarse threading and Class 2A thread fit deliver reliable performance in high-vibration environments, preventing loosening. The partial threading design allows for adjustable clamping force, ideal for panels, access doors, and fixtures requiring frequent adjustments. With an 80,000 psi tensile strength, it withstands heavy loads, ensuring long-term durability in demanding B2B applications.

Specification Summary & Compliance

This thumb screw features a 1/4"-20 UNC thread with Class 2A fit for precise dimensional accuracy and easy assembly. It is manufactured from 18-8 Stainless Steel with a hardness of Rockwell B83 and 80,000 psi tensile strength. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for industrial use.