S-91770A126 5-40 x 3/8" 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
- Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for reliable, long-term performance
- Enhanced load distribution thanks to the wide rounded truss head design, reducing surface damage and improving stability
- Efficient installation with Phillips No. 1 drive, providing secure torque transfer and reducing cam-out risks
- Precise thread engagement with Class 2A UNC coarse threads, ensuring consistent fit and vibration resistance
- Full threading for maximum grip across the entire 3/8" length, offering superior holding power in various materials
- Compliance with industry standards including ASME B18.6.3, RoHS 3, and REACH, ensuring safety and regulatory adherence
Professional Applications & Engineering Value
This 5-40 UNC Rounded Truss Head Screw is engineered to address common industrial challenges such as material fatigue, corrosion, and assembly efficiency. The passivated 18-8 stainless steel provides excellent resistance to oxidation and chemical exposure, making it suitable for applications in electronics, machinery, and outdoor equipment where durability is critical. The coarse UNC thread and Class 2A fit facilitate quick installation and reliable performance in high-vibration environments, reducing maintenance needs. With its wide truss head and Phillips drive, it ensures secure fastening without damaging softer materials, offering a robust solution for OEM and MRO professionals seeking consistent, compliant fasteners.
Specification Summary & Compliance
This screw adheres to ASME B18.6.3 specifications, with precise Class 2A thread fit and UNC coarse threading (5-40 size) for accurate dimensional control. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets environmental and safety standards for industrial use. The manufacturing process guarantees consistent tensile strength (70,000 psi) and hardness (Rockwell B70), supporting reliable performance in demanding applications.
