S-91979A838 3/8"-16 x 1/2" Set Screws

Key Features & Benefits at a Glance

• Superior holding power with cup point tip design that bites into shafts for permanent, vibration-resistant fastening
• Corrosion-resistant performance thanks to 18-8 stainless steel construction, ideal for harsh industrial environments
• Precision thread engagement with Class 3A fit ensuring tight tolerances and reliable assembly in critical applications
• Secure installation and removal through hex drive design that prevents cam-out and allows high torque application
• Pressure relief capability with vented construction (0.093" diameter) to prevent fluid or air pressure buildup
• Space-saving headless design that sits flush with or below the surface for compact assemblies
• Regulatory compliance meeting RoHS 3 and REACH standards for environmentally responsible manufacturing

Professional Applications & Engineering Value

This 3/8"-16 UNC hex drive set screw delivers exceptional engineering value in demanding industrial applications where reliable shaft positioning is critical. The 18-8 stainless steel construction provides excellent corrosion resistance, making it suitable for machinery exposed to moisture, chemicals, or outdoor elements. The cup point tip creates deep indentations in shafts, preventing rotational slippage even under heavy vibration - a common failure point in rotating equipment. The vented design addresses pressure buildup concerns in hydraulic systems or sealed assemblies, while the Class 3A thread fit ensures precise engagement with mating components. These headless set screws are particularly valuable in precision equipment, automotive components, and manufacturing machinery where space constraints and vibration resistance are paramount considerations.

Specification Summary & Compliance

This set screw features 3/8"-16 UNC coarse threads with Class 3A fit for precision assembly, right-hand thread direction, and a length of 1/2". Manufactured from 18-8 stainless steel with hex drive (3/16") and cup point tip configuration. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting current environmental standards for industrial fasteners.