S-94135A634 3/8"-16 x 2 1/2" ASME B18.6.3 Tamper-Resistant Drilled Spanner Stainless Steel Truss Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and long-term outdoor use.
• Exceptional holding power from the 70,000 psi tensile strength and Rockwell B87 hardness, preventing stripping and failure under heavy loads.
• Enhanced stability and load distribution thanks to the wide rounded truss head design, reducing surface pressure and material stress.
• Secure and tamper-resistant installation with the drilled spanner drive (No. 14), providing a positive grip for precise torque application.
• Reliable and fast assembly using the coarse UNC thread with Class 2A fit, ensuring easy engagement and vibration resistance in various materials.
• Optimized for partial-thread applications where unthreaded shank sections provide added shear strength and precise clamping control.
• Full regulatory compliance with ASME B18.6.3, RoHS 3, and REACH, guaranteeing safety and environmental standards for industrial and export use.

Professional Applications & Engineering Value

Engineered for demanding environments, this 18-8 Stainless Steel rounded truss head screw delivers corrosion resistance and high tensile strength, making it ideal for construction, machinery, and marine applications. The UNC coarse thread and Class 2A thread fit ensure quick, secure fastening in wood, metal, and composite substrates, reducing installation time while resisting loosening from vibrations. Its partially threaded design provides enhanced shear resistance, perfect for assemblies requiring precise clamp load without thread interference. The drilled spanner drive allows for high-torque installation in confined spaces, offering reliability where standard drives may fail. Built to ASME B18.6.3 specifications, it meets rigorous industrial standards for consistency and performance in heavy-duty fastening scenarios.

Specification Summary & Compliance

This screw features a 3/8"-16 UNC thread with Class 2A dimensional accuracy and coarse spacing, ensuring reliable fit and performance. It is manufactured in compliance with ASME B18.6.3 standards for dimensional and mechanical requirements. The product is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming adherence to environmental and safety regulations for hazardous substances.