S-92210A025 4-48 x 1/2" 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
- Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and long-term reliability.
- Precise, secure fastening ensured by Class 3A thread fit, minimizing the risk of loosening under vibration.
- High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications.
- Efficient installation and flush finish with a standard 82° countersink angle and hex drive for easy, secure driving.
- Enhanced durability from passivated finish, providing an extra layer of protection against corrosion.
- Reliable fine threading with UNF thread type, offering better adjustment and holding power in precision assemblies.
- Full compliance and safety meeting ASME B18.3 standards and environmental regulations like RoHS 3 and REACH.
Professional Applications & Engineering Value
These 4-48 UNF flat head screws are engineered to address critical needs in precision industrial assemblies, such as electronics, aerospace, and machinery, where space constraints and material integrity are paramount. The 18-8 stainless steel material, combined with a passivated finish, resists corrosion and extends service life in humid or chemically aggressive settings. The Class 3A thread fit and UNF fine thread design ensure tight tolerances, reducing the risk of thread stripping and providing reliable, vibration-resistant connections. With a flat head and 82° countersink angle, they sit flush for streamlined surfaces, while the hex drive allows for efficient torque application, minimizing installation time and improving overall assembly reliability in high-stress applications.
Specification Summary & Compliance
This screw adheres to precise dimensional standards, including a Class 3A thread fit for tight tolerance and UNF fine thread specifications. It complies with ASME B18.3 manufacturing standards, ensuring consistent quality and performance. Additionally, it meets environmental regulations such as RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), confirming its safety and sustainability for global industrial use.
