S-92198A552 1/4"-20 x 2 1/2" 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
• High tensile strength of 80,000 psi ensures reliable, long-lasting fastening under heavy loads
• Rockwell B70 hardness provides excellent wear resistance and durability
• UNC coarse threading enables quick installation and reduced cross-threading risk
• External hex drive design allows for high-torque application with standard tools
• Class 2A thread fit ensures consistent, precise engagement with mating components
• Partial threading provides optimal grip length for secure fastening in various materials

Professional Applications & Engineering Value

This 18-8 Stainless Steel hex head screw delivers exceptional performance in demanding industrial applications where corrosion resistance and mechanical strength are critical. The UNC coarse thread configuration significantly reduces installation time while maintaining secure fastening, particularly beneficial in assembly line environments. With its 80,000 psi tensile strength and Rockwell B70 hardness, this fastener withstands vibration, thermal cycling, and mechanical stress in machinery, structural frameworks, and equipment manufacturing. The external hex drive accommodates high torque applications without stripping, while the partial threading design provides controlled clamping force distribution. These hex head screws are engineered to maintain integrity in chemical processing, marine applications, and outdoor installations where environmental factors challenge fastener performance.

Specification Summary & Compliance

This 1/4"-20 x 2-1/2" hex head screw features Class 2A thread fit per ASME standards, ensuring precise dimensional accuracy and interchangeability. Manufactured to ASME B18.2.1 specifications for consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, containing no restricted substances above threshold limits. The UNC coarse thread with right-hand direction follows standardized threading protocols for reliable mating with corresponding nuts and threaded holes.