S-90200A230 5/16"-18 x 1" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced manual grip and torque application with a 3/4" diameter knurled round head, reducing the need for tools and speeding up assembly.
• Superior corrosion resistance and durability thanks to the Black-Oxide Steel finish, extending the component's service life in various environments.
• High mechanical strength and load-bearing capacity with a tensile strength of 70,000 psi and Rockwell B84 hardness, ensuring reliable performance under stress.
• Quick and easy installation facilitated by the UNC coarse (5/16"-18) thread and Class 2A fit, providing smooth engagement and reduced cross-threading risk.
• Maximum thread engagement and holding power from the fully threaded 1" length, offering versatile fastening depth in assemblies.
• Compliance with major environmental regulations including RoHS 3 and REACH, making it suitable for use in regulated industries and global supply chains.

Professional Applications & Engineering Value

This Black-Oxide Steel thumb screw is engineered to solve common industrial challenges such as frequent adjustments and tool-less access requirements. The high-profile round head with knurled texture provides a secure, non-slip grip, enabling quick hand-tightening in tight spaces or on vibrating equipment. Its UNC coarse thread pattern (5/16"-18) and Class 2A thread fit ensure rapid installation with high resistance to stripping, making it ideal for panels, access doors, and machinery guards. The robust 70,000 psi tensile strength and protective black-oxide coating offer long-term reliability in demanding environments, from electronics enclosures to automotive assemblies, reducing maintenance downtime and replacement costs.

Specification Summary & Compliance

This thumb screw adheres to UNC coarse thread standards (5/16"-18) with a Class 2A thread fit for consistent dimensional accuracy and interchangeability. It is manufactured from high-strength steel and is fully threaded along its 1" length. The product is confirmed to be RoHS 3 (2015/863/EU) compliant under exemption 6(a)-I and is REACH (EC 1907/2006) compliant as of the latest substance list, ensuring it meets stringent environmental and safety regulations for industrial use.