S-94105A399 1/2"-20 x 5/8" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with Class 3A thread fit for precise, vibration-resistant fastening in demanding applications
• Exceptional durability and corrosion resistance thanks to black-oxide coated alloy steel construction
• High strength and wear resistance provided by Rockwell C45 hardness for long service life
• Secure installation and removal with 1/4" hex drive that prevents stripping and allows high torque application
• Fine thread spacing ensures better adjustment control and superior clamping force distribution
• Reliable performance in industrial environments with full compliance to ASME B18.3 manufacturing standards
• Environmentally responsible sourcing with RoHS 3 and REACH compliance for global supply chain integration

Professional Applications & Engineering Value

This high-strength set screw delivers exceptional engineering value in industrial applications where vibration resistance and permanent positioning are critical. The black-oxide alloy steel construction combined with Rockwell C45 hardness provides superior protection against corrosion and wear, making it ideal for machinery, automotive components, and precision equipment assemblies. The 1/2"-20 UNF fine threads with Class 3A fit ensure minimal backlash and maximum clamping force, while the headless design and flat tip create flush installations that won't interfere with moving parts. The 1/4" hex drive allows for high-torque installation without slippage, solving common challenges in maintenance-heavy environments where reliability is paramount.

Specification Summary & Compliance

This set screw features 1/2"-20 UNF fine threads with Class 3A thread fit for precision tolerance, 5/8" length, and flat tip configuration. Manufactured to ASME B18.3 specifications with Rockwell C45 hardness rating. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in global industrial applications.