S-94567A570 1/4"-20 x 3/4" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced manual grip with a knurled round head and flared collar design for secure, tool-free tightening and loosening in industrial settings.
• Superior corrosion resistance and lightweight strength from 6061 Aluminum construction, ideal for applications where weight reduction and durability are critical.
• High mechanical reliability supported by a Rockwell B60 hardness and 40,000 psi tensile strength, ensuring the screw withstands significant operational stress.
• Effortless installation and broad compatibility with a fully threaded 1/4"-20 UNC coarse thread and Class 2A fit, providing consistent engagement with standard nuts and tapped holes.
• Secure and stable seating due to the flared collar, which helps distribute load and prevent over-insertion in assemblies.
• Compliance with major environmental and safety regulations, including RoHS 3 and REACH, making it suitable for global supply chains and sensitive applications.
• Right-hand thread direction for intuitive, standard clockwise tightening that aligns with common assembly practices.

Professional Applications & Engineering Value

This 6061 Aluminum Thumb Screw is engineered to address common challenges in industrial assembly, such as the need for quick, tool-free access and reliable fastening under moderate loads. The knurled head texture and flared collar profile provide exceptional grip and prevent slipping, which is crucial in environments where gloves are worn or space is limited. Made from high-strength aluminum, it offers an excellent strength-to-weight ratio, reducing overall component weight without sacrificing performance—ideal for electronics enclosures, machinery panels, and prototyping fixtures. The fully threaded 1/4"-20 UNC coarse thread with a Class 2A fit ensures rapid installation and secure holding in a variety of materials, minimizing the risk of cross-threading. Its compliance with RoHS 3 and REACH standards further supports its use in regulated industries, providing peace of mind for engineers focused on both performance and environmental responsibility.

Specification Summary & Compliance

This thumb screw adheres to precise dimensional standards, including a Class 2A thread fit for consistent, reliable engagement with standard UNC threaded components. It is manufactured in accordance with UNC coarse thread specifications (1/4"-20) and features a right-hand thread direction. The product is fully compliant with RoHS 3 (2015/863/EU) under exemption 6(b)-II for lead in aluminum alloys and REACH (EC 1907/2006), ensuring it meets stringent environmental and health safety requirements for industrial and commercial use.