S-93085A613 4-40 x 5/16" FF-S-92, QQ-P-35, MS24693-3B, NASM24693, SAE AMS2700 Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with Black-Oxide 18-8 Stainless Steel construction, ideal for harsh industrial environments and extended service life.
• High tensile strength of 70,000 psi ensures reliable, secure fastening under demanding mechanical loads.
• Rockwell B70 hardness provides excellent durability and resistance to wear and deformation.
• Full threading and Class 2A coarse UNC thread fit enable quick, easy installation and strong engagement in a variety of materials.
• Standard flat head with 100° countersink angle allows for a flush, unobtrusive finish when installed.
• Phillips drive (No. 1 size) offers widespread compatibility with common tools for efficient assembly.
• Compliance with multiple industry standards including Fed. Spec. FF-S-92 and RoHS 3/REACH, ensuring quality and environmental safety.

Professional Applications & Engineering Value

These 4-40 UNC flat head Phillips screws are engineered to address critical challenges in industrial and precision assembly. The Black-Oxide 18-8 Stainless Steel material provides superior corrosion resistance, making them suitable for applications exposed to moisture, chemicals, or outdoor conditions, such as in electronics enclosures, machinery, and automotive components. The coarse UNC threading and Class 2A thread fit ensure reliable fastening in both soft and hard materials, reducing the risk of cross-threading and improving installation speed. With a fully threaded design and flat head profile, these screws deliver consistent clamping force and a smooth, flush finish, essential for aesthetics and safety in consumer products, aerospace, and military equipment. Their high tensile strength and compliance with standards like MS24693-3B and SAE AMS2700 guarantee performance in high-stress environments, offering engineers a dependable fastening solution that minimizes maintenance and downtime.

Specification Summary & Compliance

This screw features a 4-40 UNC coarse thread with Class 2A thread fit for precise dimensional accuracy and easy assembly. It meets stringent specifications including Fed. Spec. FF-S-92, QQ-P-35, MS24693-3B, NASM24693, and SAE AMS2700, ensuring adherence to industry manufacturing norms. Additionally, it is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming its safety and environmental responsibility for global supply chains.