S-98704A725 1/4"-28 x 7/8" 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 and torque application with knurled texture and acetal plastic thumb head for secure manual operation without tools
- Superior corrosion resistance from 18-8 stainless steel construction, ideal for humid or demanding industrial environments
- Precise thread engagement and vibration resistance with Class 3A UNF fine threads ensuring reliable fastening in critical assemblies
- Low-profile design minimizes protrusion, making it suitable for space-constrained applications
- Wide thermal compatibility with a functional temperature range from 32° to 180°F for diverse operating conditions
- Dual-purpose functionality featuring both thumb operation and hex drive for flexible installation options
- Environmental regulation compliance meeting RoHS 3 and REACH standards for safe use in regulated industries
Professional Applications & Engineering Value
Engineered for precision and durability, this 18-8 stainless steel thumb screw addresses common assembly challenges in industrial settings. The low-profile round head with knurled texture and acetal plastic grip ensures secure handling, reducing slippage during manual adjustments in electronics, machinery, and instrumentation. Its fully threaded design and Class 3A UNF fine threads provide excellent vibration resistance and consistent clamping force, critical for maintaining alignment in dynamic environments. The black finish adds an aesthetic and protective layer, while the hex drive option allows for torque-intensive applications. Ideal for industrial thumb screws in OEM equipment, this component streamlines maintenance and reduces tool dependency.
Specification Summary & Compliance
This thumb screw adheres to UNF thread standards with a 1/4"-28 thread size and Class 3A thread fit for high precision. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety. The construction meets industrial specifications for dimensional accuracy, including a 7/8" length and fine thread spacing, supporting reliable performance in commercial and technical applications.
