S-94105A413 1/2"-20 x 1" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Exceptional holding power with Class 3A thread fit for precise, vibration-resistant fastening in demanding applications.
• Superior corrosion resistance provided by the black-oxide finish on alloy steel, extending service life in harsh industrial environments.
• High-strength durability from Rockwell C45 hardness, ensuring the set screw maintains its form and function under heavy loads.
• Secure and easy installation with a 1/4" hex drive, allowing for high torque application without slippage in confined, headless designs.
• Reliable fine thread engagement (UNF 1/2"-20) for a stronger connection and improved adjustment precision compared to coarse threads.
• Versatile flat tip design that minimizes surface marring and provides a positive grip on shafts and components.
• Guaranteed compliance and quality, meeting ASME B18.3, RoHS 3, and REACH standards for safe and regulated industrial use.

Professional Applications & Engineering Value

This black-oxide alloy steel set screw is engineered to solve critical challenges in machinery assembly, automotive, and aerospace sectors where component slippage can lead to failure. The headless design and 1/4" hex drive make it ideal for applications with space constraints, requiring a flush finish. Its Class 3A UNF fine threads provide superior tensile strength and vibration resistance, ensuring that pulleys, gears, and collars remain securely locked in place. The flat tip offers concentrated clamping force without damaging the seated surface, while the Rockwell C45 hardness guarantees the screw withstands repeated adjustments and high-stress conditions, reducing maintenance needs and downtime.

Specification Summary & Compliance

This set screw features a 1/2"-20 UNF thread with a Class 3A fit for high precision and a 1" length. It is manufactured from alloy steel with a black-oxide surface treatment and meets the dimensional requirements of ASME B18.3. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for use in various industrial markets.