S-90988A018 4-40 x 3/4" FF-S-92, MS51957-19 Stainless Steel Pan Head Phillips Screws
Stainless Steel Pan 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 Black-Oxide 18-8 Stainless Steel construction, ideal for harsh environments and long-term reliability.
- High tensile strength of 80,000 psi ensures secure fastening under demanding mechanical loads.
- Fully threaded UNC coarse spacing provides faster installation and improved grip in various materials.
- Class 2A thread fit guarantees consistent, reliable engagement and ease of assembly.
- Phillips No. 1 drive with rounded pan head offers efficient torque application and a low-profile, flush finish.
- Compliance with Fed. Spec. FF-S-92 (MS51957-19) ensures adherence to rigorous industrial standards for quality and performance.
- RoHS 3 and REACH compliance supports environmental safety and regulatory requirements in global markets.
Professional Applications & Engineering Value
These 4-40 UNC Rounded Pan Head Phillips Screws are engineered with Black-Oxide 18-8 Stainless Steel to address common industrial challenges such as corrosion, vibration loosening, and assembly efficiency. The fully threaded coarse UNC spacing allows for quick, secure fastening in metals, plastics, and composites, reducing installation time in high-volume production. The rounded pan head design minimizes protrusion, making it suitable for applications where a smooth surface is critical, while the Phillips drive ensures compatibility with standard tools. Ideal for industrial machinery, electronics enclosures, and automotive components, these screws deliver reliable performance in environments exposed to moisture, chemicals, and stress, enhancing product longevity and reducing maintenance costs.
Specification Summary & Compliance
This screw features a 4-40 UNC thread with Class 2A fit, ensuring precise dimensional accuracy and interchangeability. It is manufactured to meet Fed. Spec. FF-S-92 (MS51957-19) for consistent quality and performance. Additionally, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious and regulated industrial applications.
