S-92198A559 1/4"-20 x 4 1/4" ASME B18.2.1 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel construction for long-lasting performance in harsh environments
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B70 hardness for heavy-duty applications
• Reliable fastening performance with Class 2A thread fit ensuring precise engagement and vibration resistance
• Quick installation efficiency through UNC coarse thread spacing and external hex drive design
• Optimized load distribution with partial threading design that concentrates strength where needed most
• Industry-standard compliance meeting ASME B18.2.1 specifications for guaranteed interchangeability
• Environmental responsibility with RoHS 3 and REACH compliance for sustainable manufacturing practices

Professional Applications & Engineering Value

These 18-8 stainless steel hex head screws deliver critical engineering advantages in demanding industrial environments. The UNC coarse thread spacing provides superior performance in soft materials and rapid assembly applications, while the Class 2A thread fit ensures consistent clamping force and vibration resistance. The external hex drive design allows for high-torque installation with standard tools, making them ideal for machinery assembly, structural frameworks, and equipment maintenance. The partial threading configuration concentrates strength in the engaged section, preventing thread damage while maintaining full shank diameter for enhanced shear strength. These industrial hex screws withstand corrosive conditions while maintaining their 80,000 psi tensile strength, providing reliable long-term performance in manufacturing, construction, and marine applications.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit tolerance and UNC thread specifications. These screws comply with ASME B18.2.1 manufacturing standards, ensuring dimensional accuracy and mechanical properties. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming they meet current environmental safety requirements for industrial use worldwide.