S-97008A612 1/4"-20 x 1/2" Thumb Screws

Key Features & Benefits at a Glance

• Effortless hand-tightening with a wide flanged spade head design, eliminating the need for tools in quick assembly or adjustment scenarios.
• Superior corrosion resistance due to the zinc-plated steel construction, ensuring long-term reliability in various industrial environments.
• High mechanical strength with a tensile strength of 40,000 psi and Rockwell B55 hardness, providing dependable performance under load.
• Quick and secure coarse threading with UNC 1/4"-20 threads and Class 2A fit, enabling fast installation and stable connections.
• Versatile fully threaded shank for consistent grip along the entire 1/2" length, accommodating a range of material thicknesses.
• Right-hand thread direction for intuitive, standard clockwise tightening, reducing assembly errors.
• Environmentally compliant and safe for use in regulated industries, meeting RoHS 3 standards.

Professional Applications & Engineering Value

This zinc-plated steel thumb screw is engineered to solve common industrial fastening challenges where tool-free operation and durability are critical. The flanged spade head offers an enlarged gripping surface, reducing hand fatigue during repeated tightening and loosening in applications like panel access, machinery guards, and electronic enclosures. The UNC coarse thread and Class 2A fit ensure rapid engagement and reliable holding power in materials such as metal, plastic, or wood, minimizing cross-threading risks. With a robust 40,000 psi tensile strength and corrosion-resistant plating, it withstands mechanical stress and harsh conditions, making it ideal for maintenance, prototyping, and assembly lines that demand quick, secure fastening without compromising on performance or regulatory compliance.

Specification Summary & Compliance

This thumb screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. It features a 1/4"-20 coarse thread, fully threaded 1/2" length, and is manufactured from zinc-plated steel. The product complies with RoHS 3 (2015/863/EU) regulations, ensuring it is free from hazardous substances, and meets general industry specifications for mechanical fasteners in terms of hardness and tensile performance.