S-99607A213 4-40 x 5/8" Thumb Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Excellent hand-tightening grip from the knurled round head and flared collar design, reducing tool dependency
• High mechanical strength with 80,000 psi tensile strength and Rockwell B85 hardness for reliable, repeated use
• Easy, quick installation thanks to 4-40 UNC coarse threading and Class 2A thread fit for smooth engagement
• Full thread coverage along the 5/8" length provides maximum adjustability and secure fastening
• Compliance with global standards including RoHS 3 and REACH, ensuring safe use in regulated industries
• Durable, maintenance-free performance due to material properties and precision manufacturing

Professional Applications & Engineering Value

This 4-40 UNC thumb screw in 18-8 stainless steel addresses common assembly challenges in industrial settings. The knurled head and flared collar deliver exceptional manual grip, enabling quick adjustments without tools—perfect for panels, access covers, and machinery requiring frequent maintenance. Its coarse UNC thread and Class 2A fit ensure fast, reliable threading into components, minimizing cross-threading risks. With high tensile strength and corrosion resistance, it sustains performance in demanding applications like electronics enclosures, automotive assemblies, and outdoor equipment, reducing downtime and replacement costs.

Specification Summary & Compliance

This thumb screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free of hazardous substances. Manufacturing follows precise specifications for thread size 4-40, length 5/8", and material properties, supporting reliable integration in regulated and high-performance environments.