S-91375A082 2-56 x 5/8" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Exceptional holding strength with Class 3A thread fit for secure, vibration-resistant fastening in demanding applications.
• Superior corrosion resistance provided by the black-oxide finish on alloy steel, extending service life in various industrial environments.
• High durability and wear resistance from Rockwell C45 hardness, ensuring reliable performance under repeated stress.
• Easy and secure installation with the hex drive design, allowing for precise torque application and reducing slippage.
• Optimal material displacement from the cup tip, enhancing grip and preventing loosening in assembled components.
• Broad compatibility with UNC coarse threads, making it ideal for standard industrial assemblies requiring right-hand threading.
• Regulatory peace of mind by meeting ASME B18.3, RoHS 3, and REACH standards, ensuring safety and environmental compliance.

Professional Applications & Engineering Value

This 2-56 UNC set screw is engineered to address common industrial challenges such as component slippage and corrosion-induced failure. Crafted from black-oxide alloy steel, it offers enhanced resistance to rust and wear, making it suitable for machinery, automotive, and electronics where exposure to moisture and friction is prevalent. The hex drive and headless design allow for flush mounting in tight spaces, while the cup tip ensures maximum biting force into materials, reducing the need for frequent retightening. Ideal for securing gears, pulleys, and collars, this screw provides reliable performance in heavy-duty fastening applications, backed by precise UNC coarse threads for quick assembly and long-term stability.

Specification Summary & Compliance

This set screw adheres to Class 3A thread fit for high precision and consistent engagement, manufactured under ASME B18.3 specifications. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for industrial use. The product meets standardized dimensions, including a 5/8" length and UNC thread type, guaranteeing interoperability and reliability in professional settings.