S-96877A711 4-40 x 7/8" FF-S-92, QQ-P-35, MS51959-20, SAE AMS2700 Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction, ensuring long-term reliability in harsh environments.
• High tensile strength of 70,000 psi provides exceptional load-bearing capacity for demanding industrial applications.
• Fully threaded design offers maximum grip and uniform stress distribution along the entire fastener length.
• 82° countersink angle and flat head profile enable flush mounting for sleek, snag-free surfaces.
• Phillips No. 1 drive ensures secure tool engagement and efficient installation with common drivers.
• Compliance with Fed. Spec. FF-S-92, QQ-P-35, and MS51959-20 guarantees consistent quality and interchangeability.
• RoHS 3 and REACH compliance meets global environmental regulations for safe use in regulated industries.

Professional Applications & Engineering Value

This 4-40 UNC flat head screw is engineered to address critical challenges in precision assembly and corrosive environments. The passivated 18-8 stainless steel material provides excellent resistance to oxidation and chemical exposure, making it ideal for aerospace, electronics, and marine applications where durability is paramount. The coarse thread spacing and Class 2A thread fit ensure quick installation and reliable holding power, reducing assembly time while maintaining structural integrity. Its fully threaded design distributes clamping force evenly, preventing joint failure under vibration or dynamic loads. The 82° countersink angle allows for seamless integration into tapered holes, minimizing protrusion and enhancing aerodynamic or aesthetic profiles in finished products.

Specification Summary & Compliance

This fastener adheres to Class 2A thread fit tolerances per UNC standards, ensuring precise thread engagement and interchangeability. It conforms to Fed. Spec. FF-S-92, QQ-P-35, MS51959-20, and SAE AMS2700 manufacturing specifications, guaranteeing consistent dimensional accuracy and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible sourcing and usage in global markets.