S-90181A194 8-32 x 1/2" Thumb Screws

Key Features & Benefits at a Glance

• Effortless manual tightening with a spade head design (1/4" height, 15/32" width) for maximum torque application without tools.
• Superior durability and wear resistance thanks to steel construction and Rockwell B55 hardness, ensuring long service life in demanding environments.
• High mechanical strength with a tensile strength of 40,000 psi, providing reliable clamping force and resistance to loosening under vibration.
• Quick and secure installation facilitated by fully threaded, right-hand coarse (UNC) threads that enable rapid assembly and disassembly.
• Precise thread fit and interchangeability with Class 2A thread tolerance, ensuring consistent performance and compatibility with standard UNC nuts and tapped holes.
• Versatile industrial use in applications requiring frequent adjustments or tool-free fastening, thanks to the thumb screw design and robust inch-system dimensions.
• Cost-effective maintenance due to the fully threaded design, which allows for full engagement and reuse across multiple assembly cycles.

Professional Applications & Engineering Value

This 8-32 UNC thumb screw is engineered to address common industrial challenges such as the need for rapid, tool-free access and secure fastening in equipment panels, electronic enclosures, and machinery guards. The steel material and Rockwell B55 hardness provide excellent resistance to deformation and corrosion in harsh environments, while the spade head offers enhanced grip for high-torque applications. The fully threaded right-hand coarse thread ensures quick engagement and reliable holding power, reducing assembly time and minimizing the risk of cross-threading. Ideal for industrial thumb screw applications where durability and ease of use are critical, this fastener supports efficient maintenance and reduces downtime in production settings.

Specification Summary & Compliance

This thumb screw adheres to UNC thread standards with a Class 2A thread fit, ensuring precise dimensional accuracy and interchangeability. Key specifications include an 8-32 thread size, 1/2" length, and coarse thread spacing for robust performance. Manufactured from high-quality steel, it meets general industry standards for mechanical fasteners and is suitable for use in compliance with common regulatory requirements such as RoHS and REACH, supporting safe and sustainable industrial applications.