S-99926A157 3/8"-16 x 1 1/2" 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, ideal for harsh industrial environments
• Exceptional mechanical strength delivering 70,000 psi tensile strength and Rockwell B70 hardness for heavy-duty applications
• Precise Class 3A thread fit ensures secure, vibration-resistant fastening in critical assemblies
• Optimized flat head design with 100° countersink angle and undercut profile for flush mounting and reduced stress concentration
• Reliable hex drive engagement with 7/32" drive size providing superior torque transmission and reduced cam-out risk
• Versatile partial threading allows for precise clamp load control in multi-material applications
• Full regulatory compliance with RoHS 3 and REACH standards for global industrial use

Professional Applications & Engineering Value

These 3/8"-16 UNC flat head screws deliver critical engineering advantages in demanding applications. The 18-8 stainless steel composition combined with passivated finish provides exceptional resistance to corrosion and chemical exposure, making them ideal for marine, food processing, and outdoor equipment. The Class 3A thread fit and coarse UNC threading ensure rapid installation and reliable performance in high-vibration environments. The undercut flat head profile with 100° countersink angle minimizes surface protrusion while distributing stress effectively, preventing material deformation in thin-section assemblies. These features make these hex drive screws particularly valuable in machinery, structural frameworks, and transportation equipment where 70,000 psi tensile strength and dimensional stability are paramount.

Specification Summary & Compliance

This 1-1/2" flat head screw features precision 3/8"-16 UNC coarse threads with Class 3A fit for superior thread engagement. Manufacturing specifications include partial threading with minimum 1.3" thread length, 0.781" head diameter, and 100° countersink angle. The fastener complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material transparency for industrial procurement.