S-91185A406 1/4"-20 x 3/4" 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
- Tool-free operation with a knurled Acetal Plastic head for secure, comfortable hand-tightening without slipping
- Exceptional corrosion resistance from 18-8 Stainless Steel construction, ideal for demanding industrial environments
- Superior thread engagement and reliability with UNC coarse threading and Class 3A fit for precise, vibration-resistant assemblies
- Enhanced durability in varied temperatures, performing reliably in a 32° to 180° F range for consistent operation
- Low-profile, round head design provides a sleek, unobtrusive fit in space-constrained applications
- Full compliance with environmental standards, meeting RoHS 3 and REACH regulations for safe, sustainable use
- Versatile, fully threaded shank ensures maximum adjustability and holding power along the entire 3/4" length
Professional Applications & Engineering Value
This 1/4"-20 Knurled Thumb Screw is engineered to solve common industrial challenges where quick, tool-free adjustments are essential. The combination of a 18-8 Stainless Steel body and Acetal Plastic head offers a lightweight yet durable solution that resists corrosion and reduces galling. The knurled head texture ensures a firm grip even with gloved hands, speeding up maintenance and assembly in electronics, machinery, and panel access applications. Its UNC coarse threads and Class 3A fit provide rapid installation and high resistance to loosening under vibration, making it a reliable choice for industrial and commercial settings that demand both performance and regulatory compliance.
Specification Summary & Compliance
This thumb screw features a 1/4"-20 UNC coarse thread with a Class 3A fit for high precision and strength. It is fully threaded along a 3/4" length and manufactured in accordance with standard inch system measurements. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety standards for industrial use.
