S-91185A929 1/4"-20 x 1 1/2" Thumb Screws

Key Features & Benefits at a Glance

• Effortless manual tightening with a wide 1 1/4" two-arm black Acetal Plastic head for superior grip without tools.
• Excellent corrosion resistance provided by 18-8 Stainless Steel construction, ensuring long-term reliability in various environments.
• Precise and secure thread engagement with a Class 3A thread fit, reducing the risk of cross-threading and ensuring a reliable hold.
• Durability in moderate temperature applications, with a head temperature range of 32° to 180° F, thanks to the Acetal Plastic material.
• Robust fastening for coarse thread applications using 1/4"-20 UNC threads, ideal for quick assembly and disassembly.
• Compliance with environmental and safety standards, being RoHS 3 and REACH compliant, for use in regulated industries.
• Versatile partial threading allows for controlled engagement depth, suitable for applications requiring specific clamping lengths.

Professional Applications & Engineering Value

These 1/4"-20 Thumb Screws are engineered to solve common industrial fastening challenges where tool-less operation and frequent adjustments are necessary. The 18-8 Stainless Steel body offers superior corrosion resistance, making these screws ideal for use in electronics enclosures, machinery panels, and laboratory equipment that may be exposed to moisture or chemicals. The black Acetal Plastic head provides electrical insulation and a comfortable, high-torque grip, reducing operator fatigue during manual tightening. With a Class 3A thread fit and UNC coarse threads, they ensure quick, secure installation in materials like metal and plastic, minimizing the risk of stripping. Partially threaded design allows for precise positioning, which is critical in assembly lines and prototyping environments where repeatability and ease of use are paramount.

Specification Summary & Compliance

This product features a 1/4"-20 UNC coarse thread with a Class 3A thread fit for high precision and reliability. The screw is partially threaded with a minimum thread length of 1" and an overall length of 1 1/2". It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets strict environmental and health standards for industrial use.