S-91882A366 8-32 x 5/8" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced grip and torque application with a knurled round head design for easy hand-tightening in tight spaces
• Superior corrosion resistance thanks to the black-oxide steel finish, extending service life in harsh industrial environments
• High tensile strength of 70,000 psi ensures reliable fastening under heavy loads without stripping or failure
• Precise Class 2A thread fit provides smooth assembly and consistent engagement with mating components
• Fully threaded 5/8" length offers maximum holding power and flexibility in various material thicknesses
• Rockwell B84 hardness delivers excellent wear resistance and durability for repeated use
• Compliant with RoHS 3 and REACH regulations for safe use in regulated industries and global markets

Professional Applications & Engineering Value

This 8-32 UNC thumb screw is engineered for applications requiring frequent adjustments and secure fastening without tools. The black-oxide steel construction provides a durable, corrosion-resistant finish ideal for electronics enclosures, machinery panels, and automotive assemblies where exposure to moisture or chemicals is a concern. The coarse UNC thread and Class 2A fit ensure quick installation and reliable performance in materials like aluminum or plastic, reducing cross-threading risks. With its knurled round head and raised profile, it offers exceptional manual grip, speeding up maintenance and reducing downtime in industrial settings. Fully threaded for maximum engagement, it solves common issues of loosening under vibration, making it a trusted choice for OEMs and MRO professionals.

Specification Summary & Compliance

This thumb screw features a UNC 8-32 thread size with Class 2A thread fit for standard tolerance and easy assembly. It adheres to common inch-system specifications, including a coarse thread spacing for robust holding. The product is manufactured in compliance with RoHS 3 (2015/863/EU) with exemption 6(a)-I and REACH (EC 1907/2006), ensuring it meets environmental and safety standards for industrial use. Dimensions include a 1/2" head diameter, 5/8" length, and 3/8" collar diameter, providing consistent performance across applications.