S-96640A064 4-40 x 1" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws
Stainless Steel Phillips Flat Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with Black-Oxide 18-8 Stainless Steel construction, ideal for harsh industrial environments
- Exceptional tensile strength of 80,000 psi ensures reliable, long-lasting fastening under high-stress conditions
- Rockwell B80 hardness provides excellent durability and resistance to wear and deformation
- Class 2A thread fit guarantees consistent, precise engagement for smooth assembly and reduced cross-threading risks
- 82° countersink angle and flat head design allows for flush mounting, minimizing protrusion and improving aesthetics
- Fully threaded 4-40 UNC coarse thread offers maximum grip and holding power in various materials
- Phillips drive (No. 1 size) enables efficient installation with standard tools, reducing assembly time
Professional Applications & Engineering Value
These 4-40 UNC flat head screws are engineered to address critical challenges in industrial and engineering applications where corrosion resistance, strength, and reliability are paramount. The Black-Oxide 18-8 Stainless Steel material provides excellent protection against rust and chemical exposure, making them ideal for outdoor equipment, marine environments, and chemical processing facilities. The combination of 80,000 psi tensile strength and Rockwell B80 hardness ensures these Phillips drive screws maintain integrity under vibration and load, preventing failure in machinery, automotive assemblies, and electronic enclosures. The fully threaded coarse thread design enhances pull-out resistance in softer materials, while the 82° countersink angle ensures a secure, flush fit that eliminates snagging and improves safety in moving parts.
Specification Summary & Compliance
These screws feature precise Class 2A thread fit per UNC standards, ensuring dimensional accuracy and compatibility. They are manufactured in compliance with ASME B18.6.3 specifications for consistent quality and performance. Additionally, they meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming they are free from hazardous substances and safe for various industrial applications.
