S-93085A560 1/4"-28 x 7/8" FF-S-92, QQ-P-35, MS24693-C297, 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
• Exceptional mechanical strength delivering 70,000 PSI tensile strength and Rockwell B70 hardness for reliable load-bearing performance
• Precise Class 2A thread fit ensures smooth assembly and secure fastening in fine-threaded applications
• Optimized 100° countersink angle provides a flush, low-profile finish that minimizes protrusion and snagging risks
• Full threading along the 7/8" length offers maximum grip and adjustment flexibility in deep or variable material thicknesses
• Broad regulatory compliance including RoHS 3 and REACH, ensuring environmental and safety standards are met for global supply chains
• No. 3 Phillips drive enables efficient installation with common tools, reducing assembly time and labor costs

Professional Applications & Engineering Value

This 1/4"-28 UNF flat head screw is engineered to address critical challenges in precision assembly and demanding operational conditions. The passivated 18-8 stainless steel provides excellent resistance to oxidation and chemical exposure, making it suitable for aerospace, automotive, and marine applications where durability is non-negotiable. The fine thread spacing and Class 2A thread fit ensure vibration resistance and consistent clamping force, reducing the risk of loosening under dynamic loads. Its fully threaded design and standard flat head profile allow for seamless integration into countersunk holes, providing a smooth surface that prevents interference in machinery and equipment. By meeting stringent specifications like Fed. Spec. FF-S-92 and MS24693-C297, this screw delivers reliable performance in high-stress environments, enhancing the longevity and safety of industrial assemblies.

Specification Summary & Compliance

This screw features a 1/4"-28 UNF thread with Class 2A tolerance for precise fit and fine thread spacing. It complies with Fed. Spec. FF-S-92, QQ-P-35, MS24693-C297, NASM24693, and SAE AMS2700 standards, ensuring consistent quality and interoperability. Additionally, it is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, supporting environmentally responsible manufacturing and use in regulated industries.