S-91185A531 5/16"-24 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
- Secure manual operation with a knurled Acetal Plastic head that provides excellent grip and resists slipping during frequent adjustments.
- Corrosion-resistant construction using 18-8 Stainless Steel ensures long-term reliability in humid or demanding industrial environments.
- Precise thread engagement with Class 3A fine UNF threads for superior fit, reduced risk of cross-threading, and reliable fastening in precision assemblies.
- Durable and temperature-stable head made from Acetal Plastic, performing reliably in temperatures from 32° to 180° F without degrading.
- Full-length threading along the 1 1/4" length allows for maximum adjustability and secure holding power across the entire fastener.
- Low-profile round head design minimizes protrusion, making it ideal for applications where space is limited and a smooth appearance is desired.
- Compliance with environmental standards including RoHS 3 and REACH, ensuring safety and regulatory acceptance for global supply chains.
Professional Applications & Engineering Value
This 18-8 Stainless Steel Thumb Screw is engineered to address common challenges in industrial settings, such as the need for quick, tool-free adjustments without sacrificing precision or durability. The Acetal Plastic knurled head offers a secure grip even in oily conditions, reducing installation time and improving operator safety. Its fine UNF threading and Class 3A thread fit provide tight tolerances that prevent loosening under vibration, making it ideal for use in electronic enclosures, machinery panels, and instrumentation. The fully threaded design ensures consistent clamping force, while the stainless steel body resists rust and corrosion, extending service life in harsh environments. This combination of features delivers reliable performance in applications requiring repeated access and secure fastening.
Specification Summary & Compliance
This thumb screw features a 5/16"-24 UNF fine thread with Class 3A thread fit for high precision, a length of 1 1/4", and is fully threaded. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets strict environmental and safety standards for industrial components.
