S-99926A155 3/8"-16 x 1" Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish for long-lasting performance in harsh environments
• High tensile strength of 70,000 psi ensures reliable fastening in demanding industrial applications
• Precise Class 3A thread fit provides superior engagement and vibration resistance compared to standard threads
• Hex drive design with 7/32" drive size offers excellent torque transmission and prevents stripping during installation
• 100° countersink angle with undercut flat head creates a flush, professional finish while maximizing surface contact
• Rockwell B70 hardness rating maintains thread integrity and prevents deformation under load
• Compliance with RoHS 3 and REACH standards ensures environmental responsibility and global regulatory acceptance

Professional Applications & Engineering Value

These 3/8"-16 UNC flat head screws deliver exceptional engineering value through their optimized material selection and precision manufacturing. The 18-8 stainless steel composition combined with passivated surface treatment provides outstanding corrosion resistance, making them ideal for applications in marine environments, chemical processing equipment, and outdoor machinery where moisture and corrosive elements are concerns. The Class 3A thread fit ensures tighter tolerances than standard fasteners, reducing the risk of loosening in high-vibration applications such as automotive assemblies, industrial machinery, and structural frameworks. The hex drive design allows for higher torque application without cam-out, while the undercut flat head profile with 100° countersink angle provides superior seating in precision-machined countersinks, creating clean, flush installations in metal fabrication and aerospace components.

Specification Summary & Compliance

This 3/8"-16 UNC flat head screw features precision Class 3A thread fit with coarse thread spacing and right-hand threading. Manufactured to exact dimensional specifications including 1" length with 0.8" minimum thread engagement, 0.781" head diameter, and 0.157" head height. The fastener meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) standards for chemical safety, ensuring full regulatory acceptance for industrial and commercial applications worldwide.