S-93085A616 4-40 x 1/2" FF-S-92, QQ-P-35, MS24693-6B, NASM24693, SAE AMS2700 Stainless Steel Phillips Flat Head Screws

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 70,000 psi ensures dependable fastening under stress, reducing the risk of failure in demanding applications.
• Rockwell B70 hardness provides excellent durability and wear resistance, maintaining performance over repeated use.
• Class 2A thread fit with coarse UNC threading allows for quick, easy installation and secure holding in various materials.
• 100° countersink angle and flat head design enables a flush finish, minimizing protrusion and improving aesthetics in assembled products.
• Compliance with Fed. Spec. FF-S-92 and other standards guarantees consistent quality and interoperability in regulated industries.
• RoHS 3 and REACH compliance ensures environmental safety and meets global regulatory requirements for hazardous substances.

Professional Applications & Engineering Value

These 4-40 UNC flat head screws are engineered to address common industrial challenges such as corrosion, vibration loosening, and assembly efficiency. Made from Black-Oxide 18-8 Stainless Steel, they offer enhanced protection against rust and chemical exposure, making them suitable for outdoor equipment, marine hardware, and electronic enclosures. The coarse thread and Phillips drive facilitate rapid installation in soft metals or plastics, reducing labor time while the fully threaded design ensures maximum grip length. Ideal for applications requiring a low-profile fastener, the flat head with a standard profile seats seamlessly, preventing snagging and improving safety in machinery and consumer products. By combining high tensile strength with regulatory compliance, these screws deliver reliable performance in aerospace, automotive, and general manufacturing sectors.

Specification Summary & Compliance

This product features precise Class 2A thread fit per UNC standards, ensuring dimensional accuracy and interchangeability. Key specifications include a thread size of 4-40, length of 1/2", and a 100° countersink angle. It complies with Fed. Spec. FF-S-92, QQ-P-35, MS24693-6B, NASM24693, and SAE AMS2700, and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for environmental and health safety.