S-90273A443 3/8"-16 x 3 1/2" ASME B18.6.3 Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in demanding industrial environments
• High tensile strength of 60,000 psi ensures reliable fastening under heavy loads and vibration
• Precise Class 2A thread fit provides smooth installation and consistent engagement with mating components
• 82° countersink angle with standard flat head profile enables flush mounting for clean, professional finishes
• Partially threaded design offers optimal clamping force distribution while reducing material usage
• Rockwell B70 hardness rating maintains thread integrity and prevents stripping during repeated use
• Phillips No. 4 drive system allows for efficient installation with common industrial tools

Professional Applications & Engineering Value

These 3/8"-16 UNC flat head screws deliver exceptional engineering value for industrial assembly applications where flush mounting and high-strength fastening are critical. The zinc-plated steel construction provides essential corrosion protection for machinery, equipment frames, and structural components exposed to moderate environmental conditions. The coarse UNC thread design ensures rapid installation and superior resistance to vibration loosening, while the partially threaded configuration concentrates clamping force precisely where needed. With their 82° countersink angle and standard flat head profile, these screws sit perfectly flush with surfaces, eliminating protrusions that could interfere with moving parts or create safety hazards in industrial settings.

Specification Summary & Compliance

This flat head Phillips screw features precise Class 2A thread fit with 3/8"-16 UNC coarse threading and 3 1/2" length in the inch measurement system. Manufactured to ASME B18.6.3 specifications, these screws ensure dimensional accuracy and performance reliability. The product maintains full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making them suitable for global industrial supply chains and regulated manufacturing applications.