S-93005A180 1/2"-13 x 3 9/16" Thumb Screws

Key Features & Benefits at a Glance

• Maximum torque application through the large four-arm aluminum head design for superior hand-tightening without tools
• Enhanced corrosion resistance with black-oxide steel construction, extending service life in demanding industrial environments
• High-strength performance with 70,000 psi tensile strength and Rockwell C40 hardness for reliable, heavy-duty fastening
• Secure thread engagement due to Class 2A thread fit and UNC coarse threads, reducing cross-threading risks
• Quick alignment and insertion enabled by the extended tip design, speeding up assembly processes
• Environmental compliance with RoHS 3 regulations, ensuring safe use in regulated industries
• Versatile partial threading allowing unthreaded shank sections for precise clamping and pivot applications

Professional Applications & Engineering Value

Engineered for industrial settings requiring robust yet tool-free fastening, this black-oxide steel thumb screw combines high tensile strength with user-friendly operation. The aluminum four-arm head provides ample surface area for maximum manual torque, ideal for frequent adjustments in machinery guards, access panels, and jig fixtures. Its UNC coarse threads and Class 2A fit ensure rapid installation with minimal alignment issues, while the extended tip guides threads accurately into tapped holes, reducing wear. The partially threaded design offers flexibility for applications needing unthreaded shank support, making it a reliable choice for maintenance-heavy environments where durability and quick access are critical.

Specification Summary & Compliance

This thumb screw adheres to UNC thread standards with Class 2A thread fit for consistent dimensional accuracy. It meets RoHS 3 (2015/863/EU) compliance under exemption 6(a)-I for lead as a steel alloying element, ensuring environmental safety. Manufacturing conforms to specified inch-system dimensions, including a 1/2"-13 thread size, 3 9/16" length, and coarse thread spacing, supporting reliable performance in industrial fastening applications.