S-90291A870 3/8"-16 ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction for long-lasting performance in harsh environments
• Precise thread engagement with Class 3A thread fit ensuring reliable fastening and vibration resistance
• Non-marring protection from the nylon 6/6 plastic tip that prevents damage to contact surfaces
• Wide temperature tolerance with tip operating range from -50° to 250°F for diverse industrial conditions
• High torque capability through the 3/16" hex drive design for secure installation and removal
• Consistent mechanical performance with Rockwell B80 hardness providing reliable strength and durability
• Industry compliance assurance meeting ASME B18.3 specifications for quality and reliability

Professional Applications & Engineering Value

This 3/8"-16 UNC hex drive set screw delivers exceptional engineering value in demanding industrial applications where vibration resistance and surface protection are critical. The 18-8 stainless steel construction provides excellent corrosion resistance for machinery components exposed to moisture or chemicals, while the Class 3A thread fit ensures precise engagement that maintains clamping force under dynamic loads. The nylon 6/6 plastic tip offers superior protection for finished surfaces on shafts, collars, and pulleys, eliminating the need for additional protective components. The headless design with hex drive allows for flush mounting in confined spaces while providing sufficient torque transmission for secure fastening in assembly lines, automotive systems, and precision equipment manufacturing.

Specification Summary & Compliance

This set screw features 3/8"-16 UNC coarse threads with Class 3A thread fit precision and right-hand thread direction. The manufacturing complies with ASME B18.3 specifications, ensuring dimensional accuracy and performance reliability. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, confirming the product meets current environmental regulations for industrial use. The combination of 18-8 stainless steel material with Rockwell B80 hardness and nylon 6/6 tip provides a comprehensive solution for demanding fastening applications requiring both mechanical strength and surface protection.