S-93085A106 4-40 x 1/4" FF-S-92, QQ-P-35, MS24693-C2, NASM24693, SAE AMS2700 Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh industrial environments
• High tensile strength of 70,000 psi ensures reliable fastening under substantial mechanical stress
• Precise Class 2A thread fit provides smooth assembly and consistent engagement in UNC coarse threaded applications
• 100° countersink angle and flat head design enables flush mounting for streamlined surfaces and reduced snagging
• Fully threaded shank offers maximum grip length and uniform load distribution along the entire fastener
• Phillips drive (No. 1 size) allows for efficient installation with common tools while minimizing cam-out risks
• Compliance with major industry standards including Fed. Spec. FF-S-92 and SAE AMS2700 guarantees consistent quality and interoperability

Professional Applications & Engineering Value

This 4-40 UNC flat head Phillips machine screw delivers exceptional performance in demanding applications where corrosion resistance, strength, and precise fit are critical. The passivated 18-8 stainless steel material provides excellent durability against moisture, chemicals, and oxidation, making it suitable for electronics enclosures, aerospace components, and marine equipment. The fully threaded coarse UNC design ensures rapid installation and secure holding power in metals and plastics, while the 100° countersink angle allows the flat head to sit flush, preventing interference in tight assemblies. Engineered to meet rigorous specifications like MS24693-C2 and NASM24693, this screw is a trusted solution for OEMs and maintenance teams requiring reliable, long-lasting fasteners that withstand vibration and dynamic loads without compromising structural integrity.

Specification Summary & Compliance

This screw features a 4-40 UNC coarse thread with Class 2A tolerance for precise fit, a length of 1/4", and a hardness of Rockwell B70. It conforms to Fed. Spec. FF-S-92, QQ-P-35, MS24693-C2, NASM24693, and SAE AMS2700, ensuring adherence to dimensional and material standards. The product is fully RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, supporting environmentally responsible manufacturing and use in regulated industries.