S-91770A076 2-56 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 rounded truss head design, reducing surface damage and improving clamping force
- High tensile strength of 70,000 psi ensures reliable performance under heavy mechanical stress
- Easy installation and removal with Phillips No. 1 drive, minimizing tool slippage and assembly time
- Precise thread engagement thanks to UNC coarse threading and Class 2A fit, providing secure fastening in various materials
- Consistent durability with Rockwell B70 hardness, maintaining integrity through repeated use
- Full threading along the 1/4" length allows for adjustable grip depth and versatile application options
Professional Applications & Engineering Value
These rounded truss head screws are engineered to address common industrial challenges, such as vibration loosening and material fatigue. The passivated 18-8 stainless steel offers excellent resistance to oxidation and chemicals, making them suitable for electronics, machinery, and automotive assemblies where environmental factors are a concern. The UNC coarse thread and Class 2A thread fit ensure quick installation and reliable hold in softer materials or pre-tapped holes, reducing the risk of cross-threading. With a right-hand thread direction and fully threaded design, they provide uniform stress distribution, enhancing the longevity of connected components in demanding applications.
Specification Summary & Compliance
This screw adheres to ASME B18.6.3 specifications for dimensional accuracy and performance. The UNC thread type with Class 2A thread fit ensures precise tolerances, while the 1/4" length and coarse thread spacing meet standard industrial requirements. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and material sustainability.
