S-91770A124 5-40 x 1/4" ASME B18.6.3 Stainless Steel Truss Head Phillips Screws
Stainless Steel Truss Head Phillips Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh industrial environments
- Enhanced load distribution from the wide truss head design, minimizing surface damage and material stress
- High-strength performance with 70,000 psi tensile strength and Rockwell B70 hardness for reliable, durable fastening
- Effortless installation using the Phillips No. 1 drive, providing secure torque application and reducing assembly time
- Precise thread engagement with Class 2A thread fit and UNC coarse spacing, ensuring consistent, vibration-resistant connections
- Full-threaded design for maximum grip length and uniform clamping force across the entire 1/4" length
- Compliance assurance meeting ASME B18.6.3 standards and environmental regulations like RoHS 3 and REACH
Professional Applications & Engineering Value
This 5-40 UNC rounded truss head screw delivers exceptional engineering value in demanding applications where reliability and corrosion resistance are critical. The passivated 18-8 stainless steel material provides excellent protection against rust and chemical exposure, making it suitable for outdoor equipment, marine hardware, and food processing machinery. The wide truss head distributes clamping force over a larger surface area, preventing sheet metal distortion and reducing the risk of loosening under vibration. With its coarse UNC threading and Class 2A thread fit, it offers quick assembly and secure fastening in materials like aluminum and plastics, while the fully threaded design ensures consistent holding power. This industrial fastener is engineered to solve common issues like galvanic corrosion, thread stripping, and installation inefficiency in high-volume production environments.
Specification Summary & Compliance
This fastener features precise Class 2A thread fit with 5-40 UNC coarse thread specifications, manufactured to ASME B18.6.3 standards for dimensional accuracy and performance consistency. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in regulated industries.
