S-91770A128 5-40 x 1/2" 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
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for reliable load-bearing performance
• Wide truss head design provides increased bearing surface and prevents pull-through in softer materials
• Easy installation with Phillips No. 1 drive compatibility and fully threaded design for quick assembly
• Precise thread engagement with Class 2A thread fit and coarse UNC threading for secure fastening
• Regulatory compliance assurance meeting ASME B18.6.3 specifications, RoHS 3, and REACH requirements
• Right-hand threading ensures standard installation procedures and compatibility with existing equipment

Professional Applications & Engineering Value

These 5-40 UNC rounded truss head screws deliver exceptional engineering value across industrial applications where corrosion resistance and structural integrity are paramount. The passivated 18-8 stainless steel construction provides superior protection against oxidation and chemical exposure, making them ideal for manufacturing equipment, electronic enclosures, and outdoor installations. The wide truss head profile distributes clamping force effectively, preventing damage to assembled materials while the coarse UNC threading ensures rapid installation and reliable holding power. With full threading and Phillips No. 1 drive compatibility, these screws streamline assembly processes in high-volume production environments while maintaining consistent performance under mechanical stress.

Specification Summary & Compliance

This 1/2" stainless steel screw features precision 5-40 UNC coarse threading with Class 2A thread fit tolerance for consistent engagement. Manufactured to ASME B18.6.3 specifications for dimensional accuracy and performance reliability. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across regulated industries. The fully threaded design and right-hand thread direction provide standardized installation compatibility with industrial fastening systems.