S-92210A102 4-40 x 7/8" ASME B18.3, ASTM F879 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 and passivated finish, ideal for harsh industrial environments.
- Superior tensile strength of 70,000 psi ensures reliable load-bearing capacity for demanding applications.
- Precision Class 3A thread fit guarantees secure, vibration-resistant assemblies with minimal risk of loosening.
- 82° countersink angle and flat head design provide a flush, low-profile finish for streamlined surfaces.
- Hex drive (1/16") compatibility allows for easy installation and high-torque application with standard tools.
- Full threading along the 7/8" length offers consistent grip and adjustability across the entire fastener.
- Compliance with RoHS 3 and REACH regulations ensures environmental safety and global market suitability.
Professional Applications & Engineering Value
This 4-40 UNC flat head screw is engineered to address critical challenges in industrial and precision assembly, where corrosion resistance and high tensile strength are paramount. The 18-8 stainless steel construction, enhanced by a passivated finish, prevents rust and degradation in moist or chemically aggressive settings, extending service life. The Class 3A thread fit and coarse thread spacing ensure rapid, secure fastening with reduced cross-threading risks, while the hex drive design supports efficient installation in confined spaces. Ideal for machinery, electronics, and automotive components, this screw delivers consistent performance under 70,000 psi stress, meeting rigorous ASME B18.3 standards for reliability in heavy-duty fastening applications.
Specification Summary & Compliance
This fastener adheres to ASME B18.3 specifications, with precise Class 3A thread fit and UNC coarse threads for optimal engagement. Dimensions include a 7/8" length, 4-40 thread size, and 82° countersink angle, ensuring compatibility with standard components. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), confirming adherence to environmental and safety regulations for industrial use.
