S-91185A811 1/4"-20 x 1" Thumb Screws

Key Features & Benefits at a Glance

• Corrosion-resistant 18-8 stainless steel construction ensures long-term reliability in demanding industrial environments
• Ergonomic multi-lobe head design provides superior grip and torque application without tools
• Black acetal plastic head offers excellent chemical resistance and comfortable handling
• Class 3A thread fit delivers precise engagement and vibration resistance in critical assemblies
• UNC coarse threading enables quick installation and reduced cross-threading risks
• Full 1-inch threading provides maximum adjustment range and secure fastening
• RoHS 3 and REACH compliance ensures environmental responsibility and global market acceptance

Professional Applications & Engineering Value

This 1/4"-20 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 frequent-adjustment applications. The UNC coarse thread with Class 3A fit ensures reliable performance in vibration-prone environments while allowing quick hand-tightening operations. Perfect for industrial equipment, electronic enclosures, and machinery requiring tool-free maintenance, this fully threaded thumb screw withstands temperatures from 32° to 180°F, making it suitable for various operational conditions. The right-hand thread design provides intuitive installation while the multi-lobe head offers superior torque transmission compared to standard thumb screws.

Specification Summary & Compliance

This thumb screw features precise 1/4"-20 UNC coarse threading with Class 3A fit tolerance for superior thread engagement. Manufactured to industry standards with 18-8 stainless steel construction and black acetal plastic head, the fastener is fully threaded along its 1-inch length. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global markets.