S-99934A960 3/8"-16 x 1/2" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and long-term reliability.
• Exceptional holding power ensured by Class 3A thread fit, providing tighter tolerances and reduced risk of loosening under vibration.
• Easy installation and high torque capability with the 3/16" hex drive, allowing for secure tightening in confined spaces.
• Protected component surfaces thanks to the silver soft tip, which minimizes marring and damage to shafts or hubs.
• Reliable performance in high-stress applications due to Rockwell B80 hardness, offering a balance of strength and durability.
• Broad compatibility and interchangeability with 3/8"-16 UNC coarse threads, conforming to widely used industrial standards.
• Compliance with major safety and environmental regulations including RoHS 3 and REACH, ensuring responsible manufacturing.

Professional Applications & Engineering Value

This 3/8"-16 UNC set screw is engineered to address critical challenges in precision assemblies where vibration resistance and component security are paramount. The 18-8 stainless steel material provides excellent corrosion resistance, making it suitable for applications in moist or chemically aggressive environments, such as marine equipment, food processing machinery, and outdoor industrial systems. The Class 3A thread fit and coarse UNC thread design ensure a tight, reliable grip, reducing the need for frequent retightening and maintenance. The headless and hex drive configuration allows for flush mounting and easy access in tight spaces, while the silver soft tip protects expensive shafts or gears from damage during installation. Ideal for securing collars, pulleys, and gears onto shafts, this set screw enhances assembly integrity and extends service life in demanding industrial applications.

Specification Summary & Compliance

This set screw features a 3/8"-16 UNC coarse thread with Class 3A thread fit for high precision and consistent performance. It meets the ASME B18.3 specification, ensuring dimensional accuracy and manufacturing consistency. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to strict environmental and safety standards for hazardous substances.