S-91375A690 7/16"-20 x 2" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from the black-oxide coating, extending service life in harsh industrial environments.
• Exceptional holding power and vibration resistance due to the Class 3A thread fit and cup tip design, preventing loosening under dynamic loads.
• High tensile strength and durability provided by alloy steel with a Rockwell C45 hardness, ensuring reliable performance in demanding applications.
• Secure and easy installation with the 7/32" hex drive, allowing for high torque application without head protrusion.
• Precise fine thread engagement with the 7/16"-20 UNF thread, offering superior clamping force and alignment in precision assemblies.
• Compliance with major industry standards including ASME B18.3, ensuring consistent quality and interchangeability.
• Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting global regulatory requirements.

Professional Applications & Engineering Value

This black-oxide alloy steel set screw is engineered to solve critical fastening challenges in industrial settings. The headless design with a hex drive allows for flush mounting in confined spaces, while the cup tip creates a permanent dimple in the shaft, providing excellent resistance to rotational forces and vibration—a common failure point in machinery and power transmission systems. The Class 3A UNF fine thread ensures a tight, precise fit, reducing the risk of stripping in soft materials or under high cyclic loads. Made from alloy steel with Rockwell C45 hardness, it delivers the necessary strength for securing gears, pulleys, and collars without deforming, making it a reliable choice for automotive, aerospace, and heavy equipment manufacturing where high-strength set screws are essential for operational safety and longevity.

Specification Summary & Compliance

This set screw features a 7/16"-20 UNF fine thread with a Class 3A thread fit for high precision and strength. It is manufactured from alloy steel with a black-oxide surface treatment and Rockwell C45 hardness. The product complies with ASME B18.3 specifications, ensuring dimensional accuracy and performance reliability. It is also confirmed to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to environmental and safety standards for hazardous substances.