S-91771A080 2-56 x 7/16" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws
Stainless Steel Phillips Flat Head 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, ensuring long-term reliability in harsh industrial environments.
- High tensile strength of 80,000 psi provides exceptional load-bearing capacity for demanding mechanical assemblies.
- Rockwell B80 hardness delivers excellent wear resistance and maintains thread integrity under repeated use.
- Precision Class 2A thread fit guarantees smooth installation and secure fastening with standard UNC coarse threading.
- 82° countersink angle with standard flat head profile enables flush mounting for clean, professional finishes.
- Phillips No. 1 drive design offers reliable torque transmission and reduces cam-out during installation.
- Full threading along the 7/16" length ensures maximum grip and uniform stress distribution across joined materials.
Professional Applications & Engineering Value
Engineered for precision assembly, these 2-56 UNC flat head screws solve critical fastening challenges in electronics, machinery, and aerospace components. The passivated 18-8 stainless steel material resists oxidation and chemical degradation, while the coarse thread spacing and right-hand thread direction provide rapid installation in thin-section metals and plastics. The fully threaded design distributes clamping force evenly, preventing joint loosening under vibration. Ideal for applications requiring flush surface mounting, these screws combine high-strength performance with compliance to industrial standards, reducing maintenance cycles and total cost of ownership.
Specification Summary & Compliance
Manufactured to ASME B18.6.3 specifications with Class 2A thread fit for consistent dimensional accuracy. The UNC coarse thread profile ensures compatibility with standard nuts and tapped holes. These screws are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and material traceability. The 82° countersink angle and standard flat head profile adhere to industry-accepted machining practices for reliable performance in professional applications.
