S-91745A542 1/4"-20 x 1" Thumb Screws

Key Features & Benefits at a Glance

• Effortless manual operation with a wide spade-shaped head for superior grip and quick hand-tightening without tools
• Excellent corrosion resistance thanks to 18-8 Stainless Steel construction, ideal for humid or corrosive industrial environments
• Reliable coarse UNC threading ensures fast assembly and reduced cross-threading risk in various materials
• Precise Class 2A thread fit provides consistent engagement and secure fastening in standard tapped holes
• Full threading along the 1" length offers maximum adjustability and holding power across the entire shank
• Compliance with RoHS 3 and REACH regulations guarantees safe, environmentally responsible use in global markets
• Right-hand thread direction enables intuitive installation following standard industry practices

Professional Applications & Engineering Value

This 1/4"-20 spade head thumb screw is engineered to solve common challenges in maintenance panels, access covers, and frequently adjusted fixtures where tool-free operation is critical. The 18-8 Stainless Steel material provides lasting durability against rust and chemical exposure, reducing replacement costs in harsh settings like marine, food processing, or outdoor equipment. Its UNC coarse threads and Class 2A fit ensure quick, reliable engagement even in slightly worn or dirty threads, minimizing assembly time. The spade head design offers a large surface area for secure hand-tightening, making it ideal for applications requiring regular access or adjustments without compromising fastening integrity.

Specification Summary & Compliance

This thumb screw features a 1/4"-20 UNC coarse thread with Class 2A tolerance for consistent fit in standard applications. It is fully threaded along a 1" length and manufactured from 18-8 Stainless Steel. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets strict environmental and safety standards for industrial use.