S-91185A499 5/16"-18 x 1" 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
- Effortless hand-tightening with a knurled acetal plastic head for superior grip and quick adjustments without tools.
- Exceptional corrosion resistance from 18-8 stainless steel construction, ideal for harsh industrial environments.
- Reliable, secure fastening with Class 3A thread fit and coarse UNC threading, ensuring minimal loosening under vibration.
- Durable, low-profile design with a round head that fits in tight spaces while resisting wear and impact.
- Wide temperature tolerance (32° to 180° F) for the plastic head, maintaining performance in varied operating conditions.
- Full threading along the 1" length provides consistent engagement and holding power across the entire fastener.
- Compliance with RoHS 3 and REACH ensures environmental safety and meets global regulatory standards for industrial use.
Professional Applications & Engineering Value
This 5/16"-18 UNC thumb screw combines the strength of 18-8 stainless steel with the ergonomic advantage of a knurled acetal plastic head to address common assembly challenges. The coarse thread and Class 3A fit enable rapid installation and removal, reducing downtime in maintenance-heavy applications like machinery panels, electronic enclosures, and conveyor systems. The low-profile round head minimizes snagging in confined spaces, while the plastic component offers electrical insulation and resistance to chemicals. Fully threaded for uniform load distribution, it prevents stripping and ensures long-term reliability in industrial and commercial settings, supporting efficient, tool-free operations.
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 from 18-8 stainless steel with a fully threaded 1" length and features a right-hand thread direction. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets environmental and safety requirements for global industrial use.
