S-91185A855 5/16"-24 x 7/8" 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 multi-lobe head design for superior grip without tools
- Exceptional corrosion resistance from 18-8 stainless steel construction for long service life
- Precise thread engagement with Class 3A fit ensuring reliable fastening in critical applications
- Durable plastic head made from black acetal that withstands temperatures from 32° to 180°F
- Maximum holding power through fully threaded design along the entire 7/8" length
- Right-hand thread direction for standard installation familiar to operators
- Regulatory compliance meeting RoHS 3 and REACH standards for safe industrial use
Professional Applications & Engineering Value
This 5/16"-24 UNF thumb screw combines the corrosion resistance of 18-8 stainless steel with the ergonomic advantages of a black acetal plastic multi-lobe head, creating an ideal solution for applications requiring frequent adjustments without tools. The Class 3A thread fit provides precision threading that prevents cross-threading and ensures consistent clamping force in machinery, electronic enclosures, and industrial equipment. The fully threaded design offers maximum engagement depth, while the temperature-resistant acetal head maintains its integrity in environments ranging from freezing to moderate heat conditions. This combination addresses the common industrial challenge of needing reliable, reusable fasteners that can withstand repeated hand-tightening cycles without degradation.
Specification Summary & Compliance
This thumb screw features 5/16"-24 UNF fine threads with Class 3A thread fit for precision applications, manufactured to inch system measurements. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are met. The combination of 18-8 stainless steel threading and acetal plastic head provides a reliable fastening solution suitable for various industrial applications where frequent access and tool-less operation are required.
