S-91770A881 3/8"-16 x 3" ASME B18.6.3 Stainless Steel Truss Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh industrial environments
• Enhanced load distribution through the wide rounded truss head design, reducing surface damage and material stress
• High tensile strength of 70,000 psi ensures reliable performance under heavy-duty mechanical loads
• Rockwell B70 hardness provides excellent durability and resistance to wear during repeated installations
• Precise Class 2A thread fit guarantees smooth assembly and secure fastening in UNC coarse thread applications
• Partial threading design allows for controlled clamping force and improved joint stability
• Phillips No. 4 drive enables efficient installation with standard tools while minimizing cam-out risks

Professional Applications & Engineering Value

This 3/8"-16 UNC rounded truss head Phillips screw delivers exceptional engineering value in demanding industrial settings. The passivated 18-8 stainless steel material provides superior corrosion resistance, making it ideal for outdoor equipment, marine applications, and chemical processing facilities where environmental exposure is a concern. The wide truss head design distributes clamping force over a larger surface area, preventing damage to softer materials and reducing the risk of loosening under vibration. With its coarse UNC threading and partial thread configuration, it offers rapid installation and precise tension control in assembly lines, machinery manufacturing, and structural frameworks. The combination of 70,000 psi tensile strength and Rockwell B70 hardness ensures long-term reliability in high-stress applications, from heavy equipment manufacturing to industrial maintenance operations.

Specification Summary & Compliance

This screw features Class 2A thread fit tolerance with 3/8"-16 UNC coarse threading and partial threading up to 1½" minimum thread length. Manufactured to ASME B18.6.3 specifications with dimensional accuracy including 0.823" head diameter and 3" overall length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors.