S-91185A835 5/16"-18 x 1/2" Thumb Screws

Key Features & Benefits at a Glance

• Effortless manual operation with multi-lobe thumb head design requiring no tools for quick adjustments
• Superior corrosion resistance from 18-8 stainless steel construction for long-term reliability in demanding environments
• Enhanced grip and comfort through ergonomic black acetal plastic head that withstands repeated handling
• Precise thread engagement with Class 3A fit ensuring secure fastening and vibration resistance
• Wide temperature compatibility with acetal plastic head performing reliably from 32° to 180°F
• Full threading versatility allowing installation at any point along the screw's 1/2" length
• Environmental compliance assurance meeting RoHS 3 and REACH standards for sustainable manufacturing

Professional Applications & Engineering Value

This 5/16"-18 thumb screw combines the strength of 18-8 stainless steel with the ergonomic advantages of a black acetal plastic multi-lobe head to solve critical industrial challenges. The coarse UNC thread spacing and Class 3A thread fit provide rapid installation and secure fastening in applications requiring frequent adjustments, such as access panels, machine guards, and electronic enclosures. The fully threaded design offers maximum positioning flexibility while the right-hand thread direction ensures intuitive operation. Engineered for environments where tools are impractical or speed is essential, this thumb screw delivers reliable performance in maintenance operations, production line equipment, and laboratory instrumentation without compromising on durability or compliance standards.

Specification Summary & Compliance

This thumb screw features precision 5/16"-18 UNC coarse threads with Class 3A thread fit for superior dimensional accuracy. The assembly maintains strict adherence to inch system measurements with 1/2" length and 1 1/2" head diameter. Manufacturing compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring responsible material sourcing and production processes suitable for regulated industries and international markets.