S-90165A533 5/8"-11 x 3 1/16" Thumb Screws

Key Features & Benefits at a Glance

• High-torque manual operation with large four-arm head design for secure grip without tools
• Exceptional load-bearing capacity with 180,000 psi tensile strength for heavy-duty applications
• Enhanced durability and corrosion resistance through black-oxide steel construction with Rockwell C40 hardness
• Secure swivel tip engagement with removable tip and 10° maximum angle to prevent surface damage
• Reliable coarse thread performance with UNC Class 2A fit for rapid installation in industrial equipment
• Full-length threading ensures maximum adjustability and holding power across the entire fastener length
• Compliance-ready construction meeting RoHS 3 and REACH environmental regulations

Professional Applications & Engineering Value

This heavy-duty thumb screw solves critical industrial fastening challenges where high tensile strength and manual operation converge. The black-oxide steel construction provides superior corrosion resistance while maintaining Rockwell C40 hardness for repeated use in demanding environments. The removable swivel tip with 10° articulation prevents marring of sensitive surfaces while distributing clamping force evenly. With UNC coarse threads and Class 2A fit, these thumb screws deliver rapid installation and removal in machinery access panels, industrial fixtures, and equipment maintenance applications where tool-free operation is essential. The fully threaded design ensures consistent engagement depth across varying material thicknesses.

Specification Summary & Compliance

Manufactured to precise UNC 5/8"-11 coarse thread specifications with Class 2A thread fit for consistent performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Features include 3-1/16" length, 1-1/4" head height, 3" head width, and 0.625" thread diameter. The swivel tip measures 13/32" length with 11/16" diameter.