S-96640A052 4-40 x 3/16" 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
- 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 fastening under significant mechanical stress
- Rockwell B80 hardness provides superior durability and resistance to wear and deformation
- Fully threaded design with UNC coarse spacing allows for faster installation and improved grip in various materials
- 82° countersink angle with undercut flat head enables flush mounting for a clean, professional finish
- Phillips No. 1 drive offers common tool compatibility and efficient torque application
- Class 2A thread fit ensures consistent, precise engagement for reliable assembly operations
Professional Applications & Engineering Value
These 4-40 UNC flat head screws are engineered to address critical challenges in industrial assembly, where corrosion resistance and mechanical strength are paramount. The Black-Oxide 18-8 Stainless Steel construction provides excellent protection against oxidation and chemical exposure, making them suitable for electronics, machinery, and outdoor equipment. The fully threaded design with coarse UNC spacing ensures quick installation and secure fastening in soft metals or plastics, reducing assembly time. The flat head with undercut profile and 82° countersink angle allows for seamless integration into countersunk holes, preventing protrusion and minimizing snagging in moving parts. This combination of material properties and Phillips drive compatibility delivers reliable performance in high-vibration environments, enhancing the longevity and safety of your industrial applications.
Specification Summary & Compliance
This screw adheres to Class 2A thread fit tolerances and UNC coarse thread standards for consistent performance. It meets ASME B18.6.3 manufacturing specifications, ensuring dimensional accuracy and reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in environmentally sensitive and regulated industries.
