S-90165A426 5/16"-18 x 3 9/16" Thumb Screws

Key Features & Benefits at a Glance

• High-torque handling capability with four-arm thumb head design for easy manual tightening without tools
• Exceptional durability from black-oxide steel construction providing corrosion resistance in industrial environments
• Reliable load-bearing performance with 180,000 psi tensile strength and Rockwell C40 hardness
• Secure swivel tip engagement with removable tip and 10° maximum swivel angle for misalignment compensation
• Precision thread compatibility through Class 2A UNC coarse threads ensuring consistent fastening
• Extended service life with fully threaded shank maintaining grip strength across entire 3 9/16" length
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for global industrial use

Professional Applications & Engineering Value

This black-oxide steel thumb screw delivers critical engineering solutions for industrial equipment requiring frequent adjustments. The removable swivel tip with 10° angular compensation prevents surface damage during repeated installations while maintaining consistent pressure distribution. With 180,000 psi tensile strength and Class 2A UNC coarse threads, it withstands vibration-induced loosening in machinery, electronic enclosures, and assembly jigs. The four-arm head design enables rapid manual operation in confined spaces where tool access is limited, making it ideal for maintenance-heavy applications requiring both security and accessibility.

Specification Summary & Compliance

Manufactured to Class 2A thread fit standards with 5/16"-18 UNC right-hand coarse threading. Features include 3 9/16" length, 1 1/2" head width, and 11/16" collar diameter. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures suitability for international industrial supply chains.