S-90079A587 5/16"-18 x 1 1/2" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced manual operation with a large 1 1/8" knurled head for superior grip and easy hand-tightening without tools
• Reliable fastening performance due to UNC coarse threads and Class 2A thread fit ensuring smooth engagement and consistent clamping force
• Durable corrosion resistance from the black-oxide steel finish, protecting against rust in harsh industrial environments
• Versatile low-profile design with a round head and extended tip for secure placement in confined spaces
• Partial threading for precise control, allowing accurate adjustment and reduced risk of cross-threading in assembly applications
• Compliance with environmental standards through RoHS 3 adherence, ensuring safe and sustainable use in regulated industries

Professional Applications & Engineering Value

This 5/16"-18 UNC thumb screw is engineered to address common challenges in industrial settings, such as the need for quick, tool-free adjustments and resistance to wear. The black-oxide steel construction provides a robust barrier against moisture and chemicals, extending service life in applications like machinery panels, electronic enclosures, and automotive assemblies. Its coarse thread design ensures rapid installation and high load-bearing capacity, while the knurled head offers a non-slip surface for operators, reducing downtime during maintenance. Ideal for environments requiring frequent access, this screw combines durability with user-friendly features to enhance operational efficiency and reduce long-term replacement costs.

Specification Summary & Compliance

This thumb screw adheres to UNC thread standards with a Class 2A thread fit for precise dimensional accuracy and reliable performance. It is manufactured from black-oxide steel and complies with RoHS 3 (2015/863/EU) regulations, including exemption 6(a)-I for lead as an alloying element in steel, ensuring environmental safety and industry suitability.