S-92210A105 4-40 x 1/4" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws
Stainless Steel Hex Drive 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 18-8 stainless steel construction and passivated finish, ensuring long-term reliability in harsh environments.
- Superior thread engagement and vibration resistance thanks to Class 3A thread fit and coarse UNC threading, providing secure, reliable fastening.
- High tensile strength of 70,000 psi delivers robust performance for demanding industrial applications, reducing risk of fastener failure.
- Optimal flush mounting with standard 82° countersink angle and flat head design, creating a smooth, professional finish.
- Easy installation and removal with hex drive style, allowing for efficient assembly and maintenance with standard tools.
- Full threading along the 1/4" length ensures maximum grip and holding power across the entire fastener.
- Consistent hardness (Rockwell B55) provides excellent wear resistance and durability under repeated use.
Professional Applications & Engineering Value
These 4-40 UNC flat head screws are engineered to address critical fastening challenges in precision industries. The 18-8 stainless steel material combined with a passivated finish offers superior protection against corrosion, making them ideal for electronics, aerospace, and marine applications where environmental factors are a concern. The Class 3A thread fit and coarse thread spacing ensure quick assembly and high vibration resistance, reducing maintenance needs. The 82° countersink angle allows for seamless integration into components, preventing snagging and providing a clean aesthetic. With a hex drive for secure tool engagement, these screws streamline installation in confined spaces, enhancing productivity in automated or manual assembly lines.
Specification Summary & Compliance
These screws feature precise Class 3A thread fit per UNC standards, with a thread size of 4-40 and length of 1/4". Manufacturing adheres to ASME B18.3 specifications, ensuring dimensional accuracy and performance. They are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and suitability for global industrial markets.
