S-90113A169 1/4"-20 x 1 1/4" Thumb Screws

Key Features & Benefits at a Glance

• High torque capability with external hex head design for secure tool engagement and easy manual operation
• Superior corrosion resistance thanks to 18-8 stainless steel construction for long-lasting performance in harsh environments
• Exceptional mechanical strength with 80,000 PSI tensile strength and Rockwell B83 hardness to withstand heavy-duty applications
• Reliable thread engagement with Class 2A UNC coarse threads ensuring consistent fastening and vibration resistance
• Full threading design provides maximum grip length and uniform load distribution across the entire fastener
• Convenient thumb operation combined with external hex drive for versatile installation without specialized tools
• Environmental compliance meeting RoHS 3 and REACH standards for safe use in regulated industries

Professional Applications & Engineering Value

These 1/4"-20 thumb screws deliver exceptional engineering value for industrial applications where reliable fastening and frequent adjustments are required. The 18-8 stainless steel construction provides excellent corrosion resistance, making them ideal for machinery, electronic enclosures, and outdoor equipment exposed to moisture and chemicals. The UNC coarse thread spacing ensures quick assembly and disassembly while maintaining secure connections in high-vibration environments. The combination of external hex drive and thumb head design offers dual-operation capability - allowing for high-torque installation using standard tools or quick manual adjustments when needed. With fully threaded construction and Class 2A thread fit, these screws provide consistent performance in panel mounting, access covers, and adjustable components across manufacturing, aerospace, and electronics industries.

Specification Summary & Compliance

These thumb screws feature precision UNC 1/4"-20 threads with Class 2A thread fit for consistent dimensional accuracy and reliable performance. The manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safe use across regulated industries. The coarse thread spacing and right-hand thread direction follow industry-standard specifications, while the fully threaded design and precise dimensional controls (5/8" head width, 1 1/4" length) guarantee proper fit and function in demanding applications.