S-91773A266 2-56 x 1 1/4" 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 tensile strength of 100,000 psi provides reliable, high-load fastening for demanding industrial applications.
- Consistent, reliable engagement with Class 2A thread fit and UNC coarse threads for easier assembly and reduced cross-threading risk.
- Full-threaded design maximizes grip and load distribution along the entire 1-1/4" length for secure connections.
- Optimized drive performance with Phillips No. 1 drive style, offering efficient installation with standard tools.
- Compliance with major standards including ASME B18.6.3, ensuring dimensional accuracy and interchangeability.
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting global regulatory requirements.
Professional Applications & Engineering Value
These 2-56 UNC fully threaded rounded head screws are engineered to solve critical fastening challenges in industrial settings. The combination of 18-8 stainless steel and a passivated finish provides exceptional resistance to corrosion and chemical exposure, making them ideal for applications in manufacturing equipment, electronic enclosures, and outdoor machinery where environmental durability is paramount. The coarse UNC thread and Class 2A fit ensure quick, secure installation with reduced risk of stripping, while the fully threaded design offers superior holding power across the entire shank. With 100,000 psi tensile strength and Rockwell B100 hardness, these screws maintain integrity under vibration and thermal cycling, delivering long-term performance in critical assemblies.
Specification Summary & Compliance
These screws feature precise Class 2A thread fit with UNC coarse threads (2-56 size) and are manufactured to ASME B18.6.3 specifications for dimensional accuracy. They comply with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring they are free from hazardous substances and suitable for global markets.
