S-91744A548 1/4"-20 x 1 1/2" Thumb Screws

Key Features & Benefits at a Glance

• Effortless hand-tightening with a spade-shaped thumb head for maximum torque application without tools
• Superior corrosion resistance due to 18-8 Stainless Steel construction, ideal for harsh environments
• Enhanced stability and load distribution from the integrated flange design
• Quick and reliable installation with coarse UNC threading and Class 2A fit for secure fastening
• Full threading along the 1.5" length ensures consistent grip and adjustability in various applications
• Right-hand thread direction provides intuitive, standard operation for operators
• Compliance with RoHS 3 and REACH regulations guarantees safe, environmentally responsible use in industrial settings

Professional Applications & Engineering Value

This 1/4"-20 spade head thumb screw is engineered to address common industrial challenges such as frequent adjustments and tool-free access in machinery, electronics, and assembly fixtures. The 18-8 Stainless Steel material offers excellent durability against rust and chemical exposure, while the flanged design increases bearing surface to prevent loosening under vibration. Its full UNC coarse threading and Class 2A thread fit enable rapid installation and high clamping force, reducing assembly time and maintenance costs. Ideal for applications requiring reliable, hand-operated fastening in commercial equipment, automotive components, and regulatory-compliant enclosures.

Specification Summary & Compliance

This thumb screw features precise UNC coarse threads with a Class 2A thread fit for consistent dimensional accuracy. It adheres to standard inch measurements, including a thread size of 1/4"-20 and a length of 1 1/2". The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets strict environmental and safety standards for industrial use.