S-96640A161 4-40 x 1 1/4" 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
- Exceptional corrosion resistance with Black-Oxide coated 18-8 Stainless Steel, ideal for harsh industrial environments
- High tensile strength of 80,000 psi ensures reliable load-bearing capacity and joint integrity
- Full threading and Class 2A thread fit provide smooth, precise engagement and consistent fastening performance
- Standard 82° countersink angle and flat head design enable flush mounting for streamlined, professional finishes
- Phillips No. 1 drive offers efficient installation with common tools, reducing assembly time
- Rockwell B80 hardness maintains structural integrity under mechanical stress and repeated use
- Compliance with ASME B18.6.3, RoHS 3, and REACH guarantees adherence to rigorous quality and environmental standards
Professional Applications & Engineering Value
These 4-40 UNC flat head screws are engineered to address common industrial challenges such as corrosion, vibration loosening, and precise alignment requirements. The Black-Oxide 18-8 Stainless Steel construction provides superior resistance to rust and chemical exposure, making them suitable for machinery, electronics, and outdoor equipment. The coarse UNC thread and full threading ensure quick, secure fastening in various materials, while the 82° countersink angle allows for seamless integration into tapered holes, minimizing protrusion and improving aerodynamic or aesthetic profiles. With a right-hand thread and Phillips drive, they support efficient assembly lines and maintenance operations, reducing downtime and enhancing productivity in industrial screw applications.
Specification Summary & Compliance
This product features precise Class 2A thread fit and UNC coarse thread specifications, ensuring dimensional accuracy and interchangeability. Manufacturing adheres to ASME B18.6.3 standards for consistent quality. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of hazardous substances and supporting environmentally responsible sourcing for global industrial use.
