S-96640A230 4-40 x 11/16" 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
- High tensile strength of 80,000 psi ensures reliable fastening under demanding mechanical loads
- Rockwell B80 hardness provides excellent durability and resistance to wear over time
- Class 2A thread fit offers consistent, easy assembly with standard UNC coarse threading
- Fully threaded design maximizes grip and load distribution across the entire length
- 82° countersink angle and standard flat head profile enable flush mounting for a clean, professional finish
- Phillips No. 1 drive allows for efficient installation with common tools, reducing assembly time
Professional Applications & Engineering Value
These 4-40 UNC flat head screws are engineered to address critical challenges in industrial and machinery applications. The Black-Oxide 18-8 Stainless Steel material provides exceptional resistance to corrosion and oxidation, making them suitable for environments exposed to moisture, chemicals, or outdoor conditions. The coarse UNC threading and Class 2A thread fit ensure quick, secure fastening with minimal risk of cross-threading, while the fully threaded design enhances holding power in metal, plastic, or composite assemblies. The flat head profile with 82° countersink allows for seamless integration into countersunk holes, preventing protrusion and reducing snagging risks in moving parts. Commonly used in industrial machinery, electronic enclosures, and automotive components, these screws deliver reliable performance where vibration resistance and long-term integrity are paramount.
Specification Summary & Compliance
These screws feature precise Class 2A thread fit per UNC standards, ensuring dimensional accuracy and interchangeability. Manufactured in compliance with ASME B18.6.3 specifications, they guarantee consistent quality and performance. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to environmental and safety regulations for hazardous substances.
