S-91773A578 5/16"-18 x 1/2" ASME B18.6.3 Stainless Steel Round Head Phillips Screws
Stainless Steel Round 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 thanks to 18-8 stainless steel construction and passivated finish, ensuring long-term reliability in harsh environments.
- Exceptional mechanical strength with 100,000 psi tensile strength and Rockwell B100 hardness for demanding industrial applications.
- Reliable fastening performance achieved through Class 2A thread fit and UNC coarse threading, providing secure installations.
- Efficient installation and removal with a No. 3 Phillips drive and rounded head design, reducing tool slippage and operator fatigue.
- Full thread engagement across the entire 1/2" length for maximum grip and load distribution in assemblies.
- Compliance with industry standards including ASME B18.6.3, ensuring dimensional accuracy and interchangeability.
- Environmental and safety adherence with RoHS 3 and REACH compliance, making it suitable for regulated industries.
Professional Applications & Engineering Value
This 18-8 stainless steel rounded head screw is engineered to address common industrial challenges such as corrosion-induced failure and inconsistent fastening. The passivated finish enhances the natural corrosion resistance of the stainless steel, making it ideal for applications in chemical processing, marine environments, and outdoor equipment where moisture and chemicals are present. Its UNC coarse thread and Class 2A fit ensure quick assembly with reduced cross-threading risks, while the Phillips drive offers familiar, efficient torque transfer. Fully threaded for uniform stress distribution, this screw provides reliable performance in machinery, electrical enclosures, and structural assemblies, minimizing downtime and maintenance costs.
Specification Summary & Compliance
This screw features precise Class 2A thread fit and adheres to ASME B18.6.3 standards for dimensional consistency. It is manufactured with a right-hand UNC coarse thread (5/16"-18) and a passivated finish on 18-8 stainless steel. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring it meets environmental and safety regulations for industrial use.
