S-92198A638 3/8"-16 x 3 1/2" ASME B18.2.1 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments
• High tensile strength of 80,000 psi ensures reliable performance under heavy loads and vibration
• Rockwell B70 hardness provides superior durability and resistance to wear
• Coarse UNC threads with Class 2A fit offer faster installation and reduced cross-threading risks
• Partially threaded design allows for precise clamping force control in assembled components
• External hex drive with 9/16" head width enables secure tool engagement and high torque application
• Full compliance with ASME B18.2.1 guarantees dimensional accuracy and interchangeability

Professional Applications & Engineering Value

This 3/8"-16 UNC hex head screw delivers critical performance advantages in demanding industrial applications. The 18-8 Stainless Steel composition provides excellent corrosion resistance, making it suitable for outdoor equipment, marine environments, and chemical processing facilities where moisture and corrosive elements are concerns. The partially threaded design ensures optimal grip length while preventing thread interference in clearance holes, solving common assembly alignment issues. With 80,000 psi tensile strength and Rockwell B70 hardness, this fastener maintains structural integrity in high-vibration machinery, construction frameworks, and heavy equipment where joint failure is not an option. The coarse thread configuration allows for rapid installation in various materials while the external hex drive accommodates standard tools for efficient maintenance and disassembly cycles.

Specification Summary & Compliance

This hex head screw features 3/8"-16 UNC coarse threads with Class 2A thread fit for standard clearance applications. The 3-1/2" length with 1" minimum thread length provides versatile fastening capabilities. Manufacturing strictly adheres to ASME B18.2.1 dimensional standards, ensuring precise head height and width specifications. The product is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting the latest environmental regulations for hazardous substances.