S-90179A628 3/8"-16 x 1 1/2" Thumb Screws

Key Features & Benefits at a Glance

• Easy hand-tightening capability with the spade-shaped thumb head for quick assembly and disassembly without tools
• Enhanced torque application from the 15/16" head height and 13/16" width, providing superior grip and leverage
• Durable steel construction with Rockwell B55 hardness and 40,000 psi tensile strength for long-lasting performance in demanding environments
• Secure fastening ensured by the UNC coarse thread and Class 2A fit, reducing the risk of loosening under vibration
• Integrated flange design with 0.688" diameter for increased bearing surface, distributing load and preventing surface damage
• Fully threaded shank allowing for consistent engagement and adjustable positioning in various applications
• Right-hand thread direction for standard installation, facilitating intuitive use and reducing assembly errors

Professional Applications & Engineering Value

This 3/8"-16 UNC spade thumb screw is engineered to address common industrial challenges, such as the need for rapid manual adjustments in machinery, enclosures, and fixtures. The steel material with Rockwell B55 hardness and 40,000 psi tensile strength ensures it withstands mechanical stress and corrosion in harsh settings, while the coarse thread spacing and Class 2A thread fit provide reliable, vibration-resistant connections without specialized tools. Ideal for applications requiring frequent access—like electrical panels, automotive components, and production equipment—the flanged design enhances stability and protects surfaces, reducing maintenance downtime and improving operational efficiency for B2B users.

Specification Summary & Compliance

This thumb screw adheres to UNC thread standards with a Class 2A thread fit for precise dimensional accuracy and interchangeability. It features a 3/8"-16 thread size, coarse thread spacing, and fully threaded 1-1/2" length. Manufactured from high-quality steel, it meets general industry specifications for hardness and strength. While specific compliance certifications like RoHS or REACH are not detailed, it is produced to align with common industrial fastening norms, ensuring reliability in industrial applications.