S-90165A535 5/8"-11 x 3 13/16" Thumb Screws

Key Features & Benefits at a Glance

• Exceptional strength and durability with 180,000 psi tensile strength and Rockwell C40 hardness, ensuring reliable performance in demanding industrial environments.
• Superior corrosion resistance thanks to the Black-Oxide Steel finish, extending the screw's service life even in harsh conditions.
• Effortless hand-tightening and adjustment provided by the large four-arm thumb head (3" width, 1 1/4" height), eliminating the need for tools in many applications.
• Secure and adaptable fastening with a removable swivel tip that accommodates a 10° maximum angle, preventing damage to contact surfaces and ensuring even load distribution.
• Reliable and precise threading with a UNC coarse thread in a Class 2A fit, offering quick assembly and robust holding power.
• Versatile fully-threaded design for consistent engagement along the entire 3 13/16" length, providing flexibility in various material thicknesses.
• Compliance with major environmental and safety standards including RoHS 3 and REACH, ensuring responsible and safe use in regulated industries.

Professional Applications & Engineering Value

This heavy-duty thumb screw is engineered to solve common industrial fastening challenges where tool-less operation, high strength, and surface protection are critical. The Black-Oxide Steel construction provides a robust barrier against rust and corrosion, making it ideal for machinery, fixtures, and equipment exposed to moisture or varying environmental conditions. The removable swivel tip is a key engineering feature, preventing marring on finished surfaces and compensating for minor misalignments, which is invaluable in assembly lines and precision instrument mounting. Its UNC coarse thread and Class 2A thread fit ensure rapid installation and a secure hold in wood, metal, and composite materials, reducing assembly time while maintaining the integrity of the joint under high vibration or load. This combination of a user-friendly four-arm head and high tensile strength makes it a go-to solution for maintenance panels, access doors, and adjustable clamping systems.

Specification Summary & Compliance

This thumb screw adheres to precise dimensional standards, featuring a 5/8"-11 UNC thread with a Class 2A fit for consistent and reliable engagement. The manufacturing and material specifications ensure a tensile strength of 180,000 psi and a hardness of Rockwell C40. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in environments with strict environmental and safety requirements.