S-96640A061 4-40 x 3/4" 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, long-lasting fastening under demanding loads
- Rockwell B80 hardness provides excellent durability and resistance to wear and deformation
- Fully threaded design offers maximum grip and uniform stress distribution along the entire length
- Standard 82° countersink angle allows for flush mounting, enhancing aesthetic and safety in assemblies
- Class 2A thread fit with UNC coarse threading ensures easy installation and consistent performance in various materials
- Phillips drive with No. 1 size enables efficient torque application and reduces cam-out risks
Professional Applications & Engineering Value
These 4-40 UNC flat head screws are engineered to address common industrial challenges such as vibration loosening and environmental degradation. The Black-Oxide 18-8 Stainless Steel construction provides superior corrosion resistance, making them ideal for applications in electronics, machinery, and outdoor equipment where moisture or chemicals are present. The fully threaded design and coarse thread spacing ensure quick installation and strong holding power in both metal and plastic assemblies. With an 82° countersink angle, they sit flush with surfaces, reducing snagging and improving airflow in compact designs. These screws deliver reliable performance in industrial fastening scenarios, minimizing maintenance needs and downtime.
Specification Summary & Compliance
This product adheres to ASME B18.6.3 specifications, ensuring dimensional accuracy and interchangeability. Threads are manufactured to UNC standards with Class 2A fit for consistent engagement. The screws are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing they are free from hazardous substances and safe for various industrial applications.
