S-91744A537 1/4"-20 x 1/2" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced manual torque application with spade head design for superior grip without tools
• Corrosion-resistant performance in demanding environments thanks to 18-8 Stainless Steel construction
• Secure fastening with reliable thread engagement through UNC coarse threading and Class 2A fit
• Increased stability and load distribution from the integrated flange design
• Full threading for consistent holding power across the entire 1/2" length
• Compliance with international environmental standards including RoHS 3 and REACH
• Right-hand thread direction for standard installation and familiar operation

Professional Applications & Engineering Value

This 1/4"-20 thumb screw delivers critical advantages in industrial maintenance, electronic enclosures, and machinery access panels where frequent adjustments are required. The 18-8 Stainless Steel composition provides excellent corrosion resistance, eliminating degradation in humid or chemical-exposed environments. The spade head design enables high-torque manual operation without specialized tools, significantly reducing downtime during service intervals. Combined with UNC coarse threading and Class 2A fit, this flanged thumb screw ensures rapid installation and reliable vibration resistance, while the integrated flange prevents pull-through in softer materials. These features make it ideal for applications demanding both durability and operational efficiency.

Specification Summary & Compliance

This thumb screw features 1/4"-20 UNC coarse threads with Class 2A fit for standard inch-system applications. The fully threaded design maintains consistent engagement across the 1/2" length, while the flange diameter measures 0.435" for enhanced load distribution. Manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for global industrial markets and restricted substance control.