S-91746A422 1/4"-20 x 5/8" Thumb Screws
Thumb Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Effortless manual operation with a 3/4" diameter knurled round head for superior grip without tools
- Exceptional corrosion resistance from 18-8 Stainless Steel construction, ideal for harsh environments
- High-strength performance with 80,000 psi tensile strength and Rockwell B83 hardness for reliable load-bearing
- Space-saving low-profile design with 3/16" head height for applications with limited clearance
- Quick installation and secure fit with 1/4"-20 UNC coarse threads and Class 2A thread fit
- Versatile partial threading on 9/16" of the 5/8" length for flexible positioning and clamping
- Regulatory compliance assurance meeting RoHS 3 and REACH standards for global industrial use
Professional Applications & Engineering Value
Engineered for industrial applications requiring reliable manual fastening, this 18-8 Stainless Steel thumb screw combines material durability with user-centric design. The knurled round head provides maximum torque application without specialized tools, while the low-profile design solves space constraint issues in electronic enclosures, machinery panels, and instrumentation. The 1/4"-20 UNC coarse thread ensures rapid installation and removal in maintenance-heavy environments, with partial threading allowing precise adjustment in clamping applications. The corrosion-resistant properties make it suitable for outdoor equipment, marine applications, and chemical processing facilities where environmental factors challenge fastener integrity.
Specification Summary & Compliance
This thumb screw maintains Class 2A thread fit tolerance for consistent engagement and meets UNC thread standards for compatibility with North American fastening systems. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material transparency. The combination of precise dimensional control (5/8" length, 9/16" thread length) and material certification provides reliable performance for industrial assembly requirements.
