S-93085A023 2-56 x 1/2" FF-S-92, QQ-P-35, NAS662C2R8, 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 offering 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 UNC coarse threading applications
• Optimized flush mounting with standard flat head profile and 100° countersink angle for seamless surface integration
• Enhanced driving efficiency using Phillips No. 1 drive for reduced cam-out and consistent torque application
• Full threading along the 1/2" length provides maximum grip and adjustment flexibility in confined spaces
• Broad regulatory compliance meets Fed. Spec. FF-S-92, QQ-P-35, NAS662C2R8, and SAE AMS2700 for guaranteed quality and safety

Professional Applications & Engineering Value

This 2-56 UNC flat head Phillips machine screw delivers critical reliability in precision assemblies where corrosion resistance and mechanical integrity are paramount. The passivated 18-8 stainless steel material combats oxidation and chemical exposure in demanding settings like aerospace, electronics, and marine equipment. Its Class 2A thread fit and coarse UNC threading prevent cross-threading while enabling rapid installation in sheet metal, plastic housings, and machined components. The 100° countersink angle and flat head design eliminate protrusion, reducing snag risks and maintaining aerodynamic or aesthetic surfaces. Fully threaded for uniform stress distribution, this screw solves vibration-induced loosening and ensures long-term fastener stability under dynamic loads.

Specification Summary & Compliance

Manufactured to precise dimensional standards, this screw features a Class 2A thread fit per UNC specifications, ensuring interchangeability and consistent performance. Compliance is verified with Fed. Spec. FF-S-92, QQ-P-35, NAS662C2R8, and SAE AMS2700, confirming adherence to rigorous industrial and aerospace requirements. The product is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting global environmental and safety regulations for hazardous substance restrictions.