S-91410A808 5/8"-11 x 3 1/2" ASME B18.6.2 Set Screws

Key Features & Benefits at a Glance

• Exceptional holding power with coarse 5/8"-11 UNC threads and Class 2A fit for reliable, vibration-resistant fastening in demanding applications.
• Superior torque transmission via the external square drive and square head design, allowing for high installation force without stripping.
• Enhanced durability and wear resistance from the steel construction and Rockwell B80 hardness, ensuring a long service life.
• Secure component positioning with the cup tip design, which digs into the contact surface to prevent slippage and movement.
• Broad industrial compatibility due to compliance with the rigorous ASME B18.6.2 standard for dimensional consistency and performance.
• Safe for global use as it is RoHS 3 and REACH compliant, meeting international environmental and safety regulations.
• Right-hand thread direction for standard, intuitive installation and removal in common machinery and equipment.

Professional Applications & Engineering Value

This 5/8"-11 UNC square head set screw is engineered to solve critical challenges in heavy machinery, power transmission systems, and industrial equipment where components must be permanently secured against rotation and axial forces. The steel material, hardened to Rockwell B80, provides the necessary strength to resist deformation under high stress. Its coarse thread and Class 2A thread fit ensure quick assembly and a secure grip, even in applications prone to vibration. The cup tip concentrates pressure on a small contact area, effectively biting into shafts, collars, and pulleys to prevent loosening. This design is ideal for permanent or semi-permanent settings in manufacturing, automotive, and agricultural machinery, offering a reliable, ASME B18.6.2-compliant solution for demanding industrial set screw applications.

Specification Summary & Compliance

This set screw features a 5/8"-11 UNC thread with a Class 2A thread fit for standard inch-system applications, ensuring dimensional accuracy and interchangeability. It is manufactured in compliance with the ASME B18.6.2 standard, guaranteeing consistent quality and performance. The product is also confirmed to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to environmental and safety regulations for hazardous substances.