S-90282A209 5/16"-18 x 1 1/2" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced grip and torque application with a 1-1/8" diameter knurled head for secure manual tightening and loosening in various conditions.
• Reduced surface damage and misalignment thanks to the permanent swivel tip, which accommodates a 7.5° maximum angle for better contact on uneven surfaces.
• Superior corrosion resistance and durability from the black-oxide steel finish, protecting against rust in demanding industrial environments.
• High mechanical strength and load capacity with a Rockwell B85 hardness and 80,000 psi tensile strength, ensuring reliable performance under stress.
• Easy and quick installation due to the fully threaded UNC coarse thread and Class 2A fit, providing smooth engagement and consistent fastening.
• Space-saving low-profile design with a round head shape, ideal for applications with limited clearance without compromising on functionality.
• Compliance with international safety standards including RoHS 3 and REACH, making it suitable for global industrial supply chains.

Professional Applications & Engineering Value

This black-oxide steel thumb screw is engineered to address common challenges in assembly and maintenance, such as frequent adjustments and access in tight spaces. The low-profile knurled head offers exceptional manual control, reducing the need for tools and minimizing slippage in high-vibration settings. Its UNC coarse thread and Class 2A fit ensure quick, precise fastening, while the permanent swivel tip prevents marring and distributes pressure evenly, protecting sensitive components. Ideal for industrial machinery, electronic enclosures, and automotive fixtures, this screw enhances efficiency and longevity in heavy-duty applications where reliability and ease of use are critical.

Specification Summary & Compliance

This thumb screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. It is fully threaded with a 5/16"-18 size and right-hand direction. The product complies with RoHS 3 (2015/863/EU) under exemption 6(a)-I and is REACH (EC 1907/2006) compliant, ensuring it meets environmental and safety regulations for industrial use.