S-98164A722 1/2"-13 x 1 1/4" ASME B18.3, ASTM F879 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction and passivated finish, ideal for harsh industrial environments
• High-strength performance delivering 70,000 psi tensile strength for reliable load-bearing applications
• Precise Class 3A thread fit ensures secure fastening with minimal backlash in critical assemblies
• Easy installation and removal with 5/16" hex drive design requiring common tools
• Full threading coverage provides consistent engagement along the entire 1 1/4" length
• Rounded button head profile reduces snagging risks while maintaining a low-profile appearance
• Comprehensive compliance with ASME B18.3, RoHS 3, and REACH standards for quality assurance

Professional Applications & Engineering Value

This 316 stainless steel rounded head screw with UNC coarse threading and Class 3A thread fit addresses critical challenges in industrial fastening. The combination of passivated finish and marine-grade stainless steel provides exceptional protection against chemical exposure and atmospheric corrosion, making it suitable for marine equipment, chemical processing plants, and food processing machinery. The hex drive design enables high-torque installation without cam-out issues, while the fully threaded configuration ensures uniform stress distribution. These industrial screws maintain integrity in vibration-prone applications, with the rounded head eliminating sharp edges that could damage equipment or injure personnel.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with Class 3A thread fit precision. Features 1/2"-13 UNC coarse threads with 70,000 psi tensile strength. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Dimensions include 1 1/4" length, 0.875" head diameter, and 5/16" hex drive size.