S-92198A919 1"-8 x 3 3/4" ASME B18.2.1 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments
• Exceptional mechanical strength offering 80,000 psi tensile strength and Rockwell B70 hardness for heavy-duty applications
• Reliable coarse UNC threading with Class 2A fit ensures secure fastening and vibration resistance
• Optimized partial threading provides better grip in specific materials while reducing installation time
• Heavy-duty external hex drive allows for high-torque installation with standard tools
• Full compliance with ASME B18.2.1 guarantees dimensional accuracy and interchangeability
• Environmental regulation compliance with RoHS 3 and REACH standards for safe usage

Professional Applications & Engineering Value

This 1"-8 UNC hex head screw delivers exceptional engineering value in demanding industrial applications where corrosion resistance and structural integrity are paramount. The 18-8 Stainless Steel composition provides excellent protection against rust and chemical exposure, making it ideal for marine, chemical processing, and outdoor infrastructure projects. The coarse UNC thread design ensures rapid installation and superior holding power in various materials, while the partial threading configuration offers precise load distribution. With its external hex drive and substantial head dimensions, this fastener accommodates high torque requirements in heavy machinery assembly, structural steel connections, and industrial equipment maintenance, providing reliable performance where vibration resistance and long-term durability are critical.

Specification Summary & Compliance

This heavy-duty hex head screw features precise Class 2A thread fit with 1"-8 UNC coarse threads in a right-hand direction, ensuring dimensional accuracy per ASME B18.2.1 specifications. The fastener maintains 3 3/4" length with 2 1/4" minimum thread length and demonstrates full compliance with environmental regulations including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, making it suitable for regulated industrial applications requiring verified material safety and performance reliability.