S-98704A720 1/4"-28 x 3/4" 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 corrosion resistance from 18-8 stainless steel construction with a durable black finish, ideal for humid or chemically exposed environments.
- Superior grip and user comfort provided by the knurled acetal plastic head, allowing for easy hand-tightening without tools.
- Precise and reliable fastening with Class 3A UNF fine threads, ensuring tight fit and vibration resistance in critical assemblies.
- Wide operational temperature tolerance from 32° to 180°F, maintaining performance in varied industrial settings.
- Low-profile round head design minimizes protrusion, suitable for space-constrained applications while providing ample surface for grip.
- Full threading along the 3/4" length offers consistent engagement and adjustability across the entire fastener.
- Compliance with RoHS 3 and REACH regulations ensures environmental safety and meets global industry standards for hazardous substance control.
Professional Applications & Engineering Value
This 1/4"-28 UNF threaded thumb screw is engineered to address common industrial challenges such as frequent adjustments and exposure to corrosive elements. The 18-8 stainless steel body, combined with a black finish, provides excellent resistance to rust and wear, making it suitable for electronics, machinery, and outdoor equipment. The knurled acetal plastic head ensures a secure, non-slip grip even in oily or gloved conditions, reducing installation time and enhancing operator safety. Its low-profile round head and fine thread spacing allow for precise torque control and reliable performance in vibration-prone environments, offering a durable, user-friendly solution for maintenance panels, access covers, and calibration devices.
Specification Summary & Compliance
This thumb screw adheres to UNF thread standards with a Class 3A fit for high precision and strength. It features a 1/4"-28 thread size, 3/4" length, and fully threaded design. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from restricted hazardous substances and safe for industrial use.
