S-97008A620 1/4"-20 x 1 1/2" Thumb Screws

Key Features & Benefits at a Glance

• Tool-free operation with spade head design for quick manual tightening and loosening in tight spaces
• Enhanced durability with zinc-plated steel construction providing corrosion resistance in industrial environments
• Superior load distribution through integrated flange design that prevents surface damage and improves clamping force
• Reliable thread engagement with UNC coarse spacing and Class 2A fit ensuring consistent performance in vibration-prone applications
• High mechanical strength with 40,000 psi tensile strength and Rockwell B55 hardness for demanding assembly requirements
• Full threading versatility allowing installation at any point along the 1½" length for flexible positioning
• Environmental compliance meeting RoHS 3 standards for use in regulated industries and international markets

Professional Applications & Engineering Value

This zinc-plated steel thumb screw delivers exceptional value in applications requiring frequent adjustments or quick access panels. The flanged spade head design eliminates the need for tools while providing superior grip and torque application, making it ideal for maintenance covers, electronic enclosures, and machinery guards. The UNC coarse thread with Class 2A fit ensures rapid installation and reliable holding power in materials where fine threads might strip or fail. With full threading along its 1½" length, engineers gain installation flexibility while the zinc plating offers corrosion protection in moderate environments. These thumb screws solve common assembly challenges by combining manual operation convenience with the structural integrity needed for industrial equipment, reducing maintenance time while maintaining secure fastening in vibration-intensive applications.

Specification Summary & Compliance

This thumb screw features precision 1/4"-20 UNC coarse threads with Class 2A fit tolerances per ASME B1.1 standards, ensuring consistent thread engagement and interchangeability. The fully threaded design provides maximum adjustment flexibility across the entire 1½" length. Manufacturing complies with RoHS 3 (2015/863/EU) environmental regulations, making these screws suitable for international markets and regulated industries. The combination of zinc-plated steel construction, Rockwell B55 hardness, and 40,000 psi tensile strength delivers reliable performance for industrial fastening applications requiring both manual operation and mechanical durability.