S-91185A965 5/16"-18 x 1 1/4" 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
- Enhanced manual operation with a comfortable two-arm black acetal plastic head for easy hand-tightening without tools
- Superior corrosion resistance from 18-8 stainless steel construction, ideal for humid or demanding industrial environments
- Precise and secure fastening with Class 3A thread fit and coarse UNC threading, ensuring reliable engagement and vibration resistance
- Durable and temperature-resistant head made of acetal plastic, performing reliably from 32° to 180°F without degradation
- Full-threaded design for maximum grip along the entire 1 1/4" length, providing consistent holding power
- Compliance with environmental standards including RoHS 3 and REACH, ensuring safe use in regulated industries
- Right-hand threading for intuitive installation and removal, compatible with standard UNC nuts and tapped holes
Professional Applications & Engineering Value
This 5/16"-18 UNC thumb screw combines 18-8 stainless steel with a black acetal plastic head to address common industrial challenges such as frequent adjustments and exposure to moderate temperatures. The two-arm design offers excellent grip for manual operation, reducing the need for tools in assembly lines, machinery panels, and electronic enclosures. Its Class 3A thread fit and coarse threading ensure quick, secure fastening in applications where vibration loosening is a concern, such as in automotive fixtures or packaging equipment. The fully threaded body and temperature-resistant head make it suitable for environments requiring repeated use and reliability, from manufacturing setups to outdoor instrumentation.
Specification Summary & Compliance
This thumb screw adheres to UNC coarse thread standards with a Class 3A thread fit for precise dimensional accuracy. It is manufactured with a fully threaded 1 1/4" length and right-hand threading. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for global industrial markets.
