S-99926A152 5/16"-18 x 1 3/4" 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 extended service life in harsh environments
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for reliable performance under high-stress conditions
• Precision flush mounting featuring a 100° countersink angle and undercut flat head profile for seamless, professional installations
• Optimized thread engagement with Class 3A thread fit and UNC coarse threads ensuring secure fastening and vibration resistance
• Enhanced drive stability through 5/32" hex drive design providing superior torque transmission and reduced cam-out risk
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for safe, environmentally responsible industrial use
• Versatile partial threading allowing precise control over clamping force in diverse assembly applications

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these 18-8 stainless steel flat head screws deliver critical performance advantages where corrosion resistance and structural integrity are paramount. The combination of UNC coarse threading and Class 3A thread fit ensures rapid installation with minimal cross-threading risk in production environments. The passivated finish significantly enhances the natural corrosion resistance of stainless steel, making these hex drive screws ideal for marine equipment, food processing machinery, and outdoor structures exposed to moisture and chemicals. The undercut flat head profile with 100° countersink angle creates truly flush surfaces in precision assemblies, eliminating protrusions that could interfere with moving components or compromise aesthetic requirements in consumer products and industrial enclosures.

Specification Summary & Compliance

These 5/16"-18 UNC flat head screws maintain precise dimensional accuracy with Class 3A thread fit tolerances and coarse thread spacing per Unified Thread Standard specifications. The 1-3/4" length features partial threading with minimum thread length of 1.6". Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and workplace safety. Mechanical properties include verified 70,000 psi tensile strength and Rockwell B70 hardness for consistent performance across industrial applications.