S-91185A511 5/16"-24 x 1/2" 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 Grip & Comfort: Knurled acetal plastic head provides superior manual handling without tools, reducing installation time and operator fatigue.
- Corrosion Resistance: 18-8 stainless steel construction ensures long-term durability in humid or mildly corrosive industrial environments.
- Precision Thread Engagement: Class 3A thread fit delivers tighter tolerances for secure, vibration-resistant fastening in critical assemblies.
- Space-Efficient Design: Low-profile round head and fully threaded 1/2" length allow for compact installations where clearance is limited.
- Temperature Adaptability: Operates reliably in temperatures from 32° to 180°F, suitable for varied operational conditions.
- Fine Thread Advantage: 5/16"-24 UNF fine threads offer improved adjustment precision and higher load distribution in thinner materials.
- Regulatory Compliance: Meets RoHS 3 and REACH standards, ensuring safety and environmental adherence for global supply chains.
Professional Applications & Engineering Value
This thumb screw combines the strength of 18-8 stainless steel with the ergonomic benefits of a knurled acetal plastic head, addressing common industrial challenges like rapid assembly and corrosion. The Class 3A thread fit and fine UNF threading provide exceptional clamp force retention, minimizing loosening under vibration in machinery, electronic enclosures, and calibration equipment. Its low-profile design is ideal for applications with spatial constraints, while the fully threaded shank ensures consistent engagement across the entire length. Engineered for environments requiring frequent adjustments, this screw reduces tool dependency and maintenance downtime, offering a reliable solution for OEMs and MRO professionals.
Specification Summary & Compliance
This thumb screw adheres to UNF thread standards with a 5/16"-24 fine thread and Class 3A thread fit for high precision. Dimensions include a 1" head diameter, 1/2" length, and right-hand threading. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets strict environmental and safety requirements for industrial use.
