S-93005A561 1/2"-13 x 2 1/2" Thumb Screws

Key Features & Benefits at a Glance

• High-torque manual operation with four-arm thumb head design for secure grip without tools
• Exceptional load-bearing capacity with 180,000 psi tensile strength for heavy-duty applications
• Superior corrosion resistance through black-oxide steel construction in demanding environments
• Precise thread engagement with Class 2A UNC coarse threads ensuring reliable fastening
• Full-length threading providing maximum adjustment range and holding power
• Extended tip design enabling easier alignment and insertion in assembly operations
• Enhanced durability with Rockwell C40 hardness resisting wear and deformation

Professional Applications & Engineering Value

This black-oxide steel thumb screw delivers critical performance where manual adjustment under high stress is required. The four-arm head design provides substantial mechanical advantage for operators to achieve proper clamping force without specialized tools. With fully threaded UNC coarse threads and Class 2A fit, it ensures rapid installation and reliable engagement in machinery, industrial equipment, and structural assemblies. The extended tip facilitates alignment in blind holes, reducing assembly time in manufacturing and maintenance operations. The combination of 180,000 psi tensile strength and Rockwell C40 hardness makes it ideal for applications requiring repeated adjustments without thread deformation or failure.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit and UNC 1/2"-13 coarse threading. Features include 2½" total length, 2¼" thread length, and 1" collar diameter. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for industrial use.