S-91185A861 5/16"-24 x 1 1/2" Thumb Screws

Key Features & Benefits at a Glance

• Superior hand-tightening grip with multi-lobe head design for enhanced torque application without tools
• Excellent corrosion resistance from 18-8 stainless steel construction for long service life in harsh environments
• Durable plastic head made from black Acetal material providing electrical insulation and chemical resistance
• Precise thread engagement with Class 3A fit ensuring reliable fastening in fine-thread applications
• Wide temperature compatibility with head operating range from 32° to 180° F for various industrial settings
• Full threading design allowing consistent engagement along the entire 1-1/2" length for secure fastening
• Environmental compliance meeting RoHS 3 and REACH regulations for safe use in regulated industries

Professional Applications & Engineering Value

This 5/16"-24 UNF thumb screw combines the corrosion-resistant properties of 18-8 stainless steel with the ergonomic advantages of a black Acetal plastic multi-lobe head to solve critical industrial fastening challenges. The fine thread spacing and Class 3A thread fit provide exceptional vibration resistance in precision equipment, while the fully threaded design ensures maximum engagement in panel mounting, electronic enclosures, and machinery access points. The multi-lobe configuration delivers superior hand-tightening performance for applications requiring frequent adjustments or tool-less operation, making it ideal for maintenance panels, test equipment, and industrial controls where quick access and reliable fastening are essential. The right-hand thread direction follows standard convention for intuitive installation across various industrial settings.

Specification Summary & Compliance

This thumb screw features precision 5/16"-24 UNF threads with Class 3A thread fit for superior dimensional accuracy and fine thread spacing. The manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in industrial applications. The combination of 18-8 stainless steel construction and Acetal plastic head provides reliable performance with a 1-1/2" fully threaded length for consistent fastening capability.