S-98704A735 1/4"-28 x 1 3/8" Thumb Screws
Thumb Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Enhanced Grip & Comfort: Knurled black acetal plastic head ensures secure, tool-free hand tightening and reduces slippage during adjustments.
- Superior Thread Precision: Class 3A thread fit provides tighter tolerances for reliable, vibration-resistant fastening in critical assemblies.
- Corrosion Resistance & Durability: 18-8 stainless steel construction offers excellent resistance to rust and corrosion in various environments.
- Low-Profile Design: Round, low-profile head saves space and is ideal for applications with clearance constraints.
- Versatile Temperature Performance: Operates effectively in temperatures from 32° to 180°F, suitable for a range of industrial settings.
- Dual Drive Options: Combines a thumb head for manual use with a 3/16" hex drive for added torque application when needed.
- Regulatory Compliance: Meets RoHS 3 and REACH standards, ensuring safety and environmental responsibility in your supply chain.
Professional Applications & Engineering Value
This low-profile thumb screw is engineered to solve common assembly challenges where space is limited and frequent adjustments are necessary. The 18-8 stainless steel body ensures long-term corrosion resistance, while the black acetal plastic knurled head provides a non-marring, high-friction surface that improves grip without tools. Its 1/4"-28 UNF fine thread and Class 3A thread fit deliver precise engagement, reducing the risk of cross-threading and maintaining clamp load in vibrating environments. Ideal for electronics enclosures, machinery panels, and instrumentation, this partially threaded design allows for controlled fastening depth, enhancing efficiency in production and maintenance cycles.
Specification Summary & Compliance
This thumb screw adheres to UNF thread standards with a Class 3A thread fit for high precision. It features a 1/4"-28 fine thread, 1" minimum thread length, and a right-hand thread direction. The product is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety requirements for industrial use.
