S-91781A626 3/8"-16 x 1 1/4" ASME B18.6.3 Stainless Steel Slotted Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish for extended service life in harsh environments
• Exceptional mechanical strength delivering 80,000 psi tensile strength and Rockwell B80 hardness for reliable performance under heavy loads
• Precision thread engagement with Class 2A fit and UNC coarse threads ensuring secure fastening and vibration resistance
• Optimized flush mounting featuring standard 82° countersink angle for seamless surface integration in industrial assemblies
• Full-threaded design providing maximum grip length and load distribution across the entire fastener
• Industry-standard compliance meeting ASME B18.6.3 specifications for dimensional accuracy and interchangeability
• Environmental responsibility with RoHS 3 and REACH compliance for safe use in regulated applications

Professional Applications & Engineering Value

These 3/8"-16 UNC flat head screws deliver critical performance advantages in demanding industrial applications. The 18-8 stainless steel composition combined with passivated finish provides exceptional resistance to corrosion, making them ideal for machinery, marine equipment, and chemical processing environments where moisture and corrosive agents are present. The fully threaded design ensures maximum holding power across the entire 1-1/4" length, while the Class 2A thread fit and UNC coarse threads facilitate quick installation and reliable performance in vibration-prone applications. The standard 82° countersink angle allows for flush mounting in precision assemblies, eliminating protrusions that could interfere with moving components. These flat head screws are engineered to maintain integrity under 80,000 psi tensile stress, providing dependable fastening solutions for structural components, equipment frames, and heavy-duty manufacturing applications.

Specification Summary & Compliance

Manufactured to exacting ASME B18.6.3 standards with Class 2A thread fit tolerance for precision engagement. Features UNC coarse threads (3/8"-16) with standard 82° countersink angle and slotted drive configuration. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across industrial sectors. Mechanical properties include Rockwell B80 hardness and 80,000 psi tensile strength for reliable performance in demanding applications.