S-93085A618 4-40 x 3/4" FF-S-92, QQ-P-35, MS24693-8B, NASM24693, SAE AMS2700 Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide coated 18-8 Stainless Steel, ideal for harsh industrial environments
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for reliable load-bearing performance
• Precision thread engagement with Class 2A UNC coarse threads ensuring consistent, vibration-resistant fastening
• Optimized flush mounting featuring a standard 100° countersink angle for seamless surface integration
• Full-threaded design providing maximum grip length and superior holding power across the entire fastener
• Broad regulatory compliance meeting multiple military (Fed. Spec.) and aerospace standards for critical applications
• Enhanced drive stability with No. 1 Phillips drive offering secure torque transmission during installation

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these 4-40 UNC flat head screws deliver critical performance advantages in aerospace, electronics, and precision machinery. The Black-Oxide 18-8 Stainless Steel construction provides excellent corrosion resistance while maintaining 70,000 psi tensile strength, making them suitable for environments where both durability and material integrity are paramount. The fully threaded design with Class 2A UNC coarse threads ensures maximum thread engagement and vibration resistance in thin-section materials. The 100° countersink angle allows for flush mounting in precision assemblies, while the Phillips drive facilitates efficient installation in high-volume production settings. These screws are particularly valuable in applications requiring compliance with military specifications and environmental regulations.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit and UNC coarse threading. Complies with Fed. Spec. FF-S-92, QQ-P-35, MS24693-8B, NASM24693, and SAE AMS2700 specifications. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance requirements. Features right-hand threading with standard flat head profile and No. 1 Phillips drive size for consistent performance across industrial applications.