S-91771A181 2-64 x 3/16" 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, ideal for harsh or humid industrial environments
- High tensile strength of 80,000 PSI ensures reliable fastening under significant mechanical stress and vibration
- Precision Class 2A thread fit guarantees smooth installation and secure, consistent engagement in tapped holes
- Undercut flat head design allows for a flush, low-profile finish that minimizes protrusion and snagging risks
- 82° countersink angle provides optimal seating in standard countersunk holes for enhanced stability
- Fine UNF threading (2-64) delivers superior holding power in thin materials and precision assemblies
- Full compliance with ASME B18.6.3, RoHS 3, and REACH ensures material safety, environmental responsibility, and interchangeability
Professional Applications & Engineering Value
These 2-64 UNF flat head screws are engineered for precision applications where space constraints and material integrity are critical. The passivated 18-8 stainless steel offers excellent resistance to oxidation and chemical exposure, making them suitable for electronics, aerospace components, medical devices, and marine equipment. The undercut head and 82° countersink angle ensure a seamless, flush mount that prevents interference in tightly packed assemblies. With a fine thread profile and Class 2A fit, these screws provide superior grip in thin sheets and delicate materials, reducing the risk of stripping. The Phillips No. 1 drive allows for efficient installation with standard tools, enhancing assembly speed while maintaining torque control in automated or manual settings.
Specification Summary & Compliance
This product adheres to Class 2A thread tolerances per unified screw thread standards, ensuring precision fit. It conforms to ASME B18.6.3 for dimensional consistency and mechanical properties. The screw is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted hazardous substances. Manufactured from 18-8 stainless steel with a passivated finish, it meets industry demands for durability and environmental safety in professional and industrial applications.
