S-91744A542 1/4"-20 x 1" 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 hand-tightening with a spade-shaped head design for maximum torque application without tools
- Superior corrosion resistance thanks to 18-8 stainless steel construction, ideal for harsh environments
- Enhanced stability and load distribution from the integrated flange, reducing the risk of surface damage
- Reliable and quick assembly with UNC coarse threading and Class 2A fit for consistent engagement
- Full thread coverage along the 1" length ensures secure fastening across the entire grip range
- Compliance with global safety standards including RoHS 3 and REACH for safe industrial use
- Optimized grip and comfort with a 19/32" head height and 33/64" head width for easy manual operation
Professional Applications & Engineering Value
This 1/4"-20 spade head thumb screw is engineered to address common industrial challenges like frequent adjustments and tool-free access in confined spaces. The 18-8 stainless steel material provides excellent resistance to rust and corrosion, making it suitable for applications in electronics, machinery panels, and outdoor equipment where environmental factors are a concern. The flanged design increases bearing surface area, preventing loosening under vibration and distributing pressure evenly to protect sensitive components. With UNC coarse threads and a Class 2A fit, it ensures rapid installation and reliable performance in right-hand thread assemblies, reducing downtime and maintenance costs in B2B settings such as manufacturing, automotive, and HVAC systems.
Specification Summary & Compliance
This thumb screw adheres to precise dimensional standards, including a 1/4"-20 UNC coarse thread with Class 2A fit for consistent tolerance and ease of use. It is fully threaded along a 1" length and features a flange diameter of 0.435". The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets strict environmental and safety requirements for industrial components.
