S-91185A959 5/16"-18 x 3/4" Thumb Screws

Key Features & Benefits at a Glance

• Corrosion-resistant 18-8 stainless steel construction ensures long-lasting durability in harsh industrial environments
• Comfortable black acetal plastic head provides secure hand-tightening without tools and resists wear
• UNC coarse threading with Class 3A fit delivers superior engagement and vibration resistance in assemblies
• Fully threaded design maximizes holding power across the entire screw length
• Two-arm thumb screw head shape offers excellent grip and quick manual adjustment
• RoHS 3 and REACH compliance meets strict environmental regulations for global industrial use
• Wide head temperature range (32° to 180°F) maintains performance in varied operating conditions

Professional Applications & Engineering Value

This 5/16"-18 thumb screw combines 18-8 stainless steel with a black acetal plastic head to solve common industrial fastening challenges. The corrosion-resistant material prevents degradation in moist or chemical-exposed environments, while the UNC coarse thread and Class 3A thread fit ensure rapid installation and reliable clamping force in machinery, electronics, and equipment panels. The two-arm design allows for effortless hand-tightening in tight spaces, reducing assembly time. Ideal for applications requiring frequent adjustments, such as access panels, jigs, and industrial controls, this fully threaded thumb screw delivers consistent performance where tool-free operation is critical.

Specification Summary & Compliance

This thumb screw features a 5/16"-18 UNC coarse thread with Class 3A thread fit for precision alignment. Dimensions include a 3/4" length, 13/32" head height, and 1 1/2" head width. Manufactured from 18-8 stainless steel with a black acetal plastic head, it is fully threaded and right-hand threaded. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards for industrial components.