S-98816A263 1/4"-20 x 5/8" Thumb Screws

Key Features & Benefits at a Glance

• Superior hand-tightening capability with a 5/8" knurled head for excellent grip and torque application without tools
• Enhanced durability and corrosion resistance provided by the brass material, ideal for various industrial environments
• Reliable and secure fastening ensured by the Class 2A UNC coarse thread, offering consistent performance in demanding applications
• High mechanical strength with a tensile strength of 50,000 psi and Rockwell B78 hardness for long-lasting use
• Full threading along the 5/8" length allows for maximum engagement and adjustability in assemblies
• Compliance with environmental standards as it is RoHS 3 compliant, meeting industry regulations for safe use
• Easy installation and removal due to the right-hand thread direction and raised round head design for quick manual operation

Professional Applications & Engineering Value

This 1/4"-20 brass thumb screw is engineered to address common challenges in industrial settings, such as the need for quick, tool-free adjustments and resistance to corrosion. The knurled head provides a non-slip surface, enabling high torque application by hand, which reduces assembly time and minimizes the risk of damage from tools. Made from brass, it offers inherent corrosion resistance, making it suitable for applications in electronics, machinery, and outdoor equipment where moisture or chemicals are present. The UNC coarse thread and Class 2A fit ensure easy starting and reliable holding power in materials like metal or plastic, preventing stripping and ensuring consistent performance in industrial thumb screw applications. Its fully threaded design and raised head profile further enhance versatility and grip, providing a dependable solution for frequent access panels, prototypes, and maintenance tasks.

Specification Summary & Compliance

This thumb screw adheres to precise dimensional standards, including a Class 2A thread fit for consistent tolerance and a UNC coarse thread with a size of 1/4"-20. It meets manufacturing specifications for hardness (Rockwell B78) and tensile strength (50,000 psi), ensuring reliable performance. The product is RoHS 3 (2015/863/EU) compliant with exemption 6(c) for lead in copper alloy, confirming its suitability for regulated industrial environments.