S-91185A837 5/16"-18 x 5/8" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced manual grip and torque application with the multi-lobe Acetal Plastic head design, reducing tool dependency and speeding up assembly
• Superior corrosion resistance and durability provided by 18-8 Stainless Steel construction, ideal for demanding industrial environments
• Reliable and precise thread engagement due to Class 3A thread fit and UNC coarse thread, ensuring secure fastening with minimal risk of cross-threading
• Wide operational temperature suitability (32° to 180°F) for the plastic head, maintaining performance in varied climate conditions
• Full threading along the 5/8" length for maximum adjustability and holding power in applications requiring deep engagement
• Compliance with strict environmental regulations including RoHS 3 and REACH, ensuring safe and sustainable use in global markets
• Right-hand thread direction and coarse spacing for quick installation and removal, enhancing efficiency in high-volume assembly lines

Professional Applications & Engineering Value

This 5/16"-18 UNC Thumb Screw is engineered to address common challenges in industrial assembly, maintenance, and equipment adjustment. The combination of an 18-8 Stainless Steel body and Acetal Plastic multi-lobe head offers a robust yet lightweight solution that resists rust, chemicals, and wear. The Class 3A thread fit and coarse UNC threading provide reliable engagement in metal, plastic, or composite materials, reducing installation time and preventing stripping. Ideal for applications requiring frequent adjustments—such as panel fastening, machinery covers, and electronic enclosures—this thumb screw ensures operator comfort and efficiency without sacrificing durability or compliance with international standards like RoHS and REACH.

Specification Summary & Compliance

The screw features a 5/16"-18 UNC thread with Class 3A fit for high precision and strength. It is fully threaded and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety. The Acetal Plastic head operates within a temperature range of 32° to 180°F, and the overall design adheres to standard inch measurements for consistent performance in industrial fastening applications.