S-97008A625 1/4"-20 x 2 1/2" Thumb Screws

Key Features & Benefits at a Glance

• Quick manual operation with spade head design for tool-free tightening and loosening in confined spaces
• Enhanced corrosion resistance through zinc-plated steel construction for extended service life in industrial environments
• Superior load distribution with integrated flange that prevents surface damage and maintains secure fastening
• High mechanical strength with 40,000 psi tensile strength and Rockwell B55 hardness for demanding applications
• Reliable thread engagement through Class 2A fit UNC coarse threads ensuring consistent performance
• Full-length threading provides maximum adjustment range and secure fastening along the entire 2½" length
• Environmental compliance with RoHS 3 standards for safe use across regulated industries

Professional Applications & Engineering Value

This zinc-plated steel thumb screw delivers exceptional value in applications requiring frequent access or adjustment. The spade head design enables rapid manual operation without tools, significantly reducing maintenance downtime in equipment panels, access covers, and machinery guards. The UNC coarse threading with Class 2A fit provides reliable engagement in various materials while resisting cross-threading. The integrated flange distributes clamping force evenly, preventing damage to sensitive surfaces. With 40,000 psi tensile strength and corrosion-resistant zinc plating, these thumb screws maintain integrity in industrial environments where vibration and environmental exposure are concerns. The full threading along the 2½" length offers versatile positioning options for variable material thicknesses.

Specification Summary & Compliance

This 1/4"-20 thumb screw features UNC coarse threads with Class 2A fit tolerances per ASME B1.1 standards, ensuring proper thread engagement and interchangeability. The right-hand threading direction follows conventional fastening practices. Manufacturing complies with RoHS 3 (2015/863/EU) environmental regulations, making it suitable for electronics, industrial equipment, and other regulated applications. The zinc-plated steel construction meets corrosion protection requirements while maintaining the specified mechanical properties of Rockwell B55 hardness and 40,000 psi tensile strength.