S-92210A103 4-40 x 3/16" 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
- Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ensuring longevity in harsh industrial environments.
- High tensile strength of 70,000 psi and Rockwell B55 hardness for reliable performance under heavy loads and vibration.
- Precise Class 3A thread fit guarantees secure, tight fastening with minimal risk of loosening in critical assemblies.
- Fully threaded design and coarse UNC thread spacing enable quick installation and strong holding power across the entire length.
- Undercut flat head with 82° countersink angle provides a flush, low-profile finish, ideal for applications requiring a smooth surface.
- Hex drive (1/16") allows for easy, high-torque installation with standard tools, reducing assembly time and effort.
- Compliance with ASME B18.3, RoHS 3, and REACH ensures adherence to industry standards and environmental safety regulations.
Professional Applications & Engineering Value
These 4-40 UNC flat head screws are engineered to address common industrial challenges, such as component loosening due to vibration and corrosion in demanding environments. The 18-8 stainless steel material combined with a passivated finish offers excellent resistance to oxidation and chemicals, making them ideal for machinery, electronics, and outdoor equipment. The Class 3A thread fit and coarse thread spacing ensure rapid, secure fastening, reducing assembly errors and maintenance needs. With a fully threaded design and undercut flat head, they provide consistent clamping force and a seamless finish, enhancing both performance and aesthetics in precision applications.
Specification Summary & Compliance
This screw features a 4-40 UNC thread size with Class 3A fit for high precision, an 82° countersink angle, and dimensions including a 3/16" length and 0.255" head diameter. It meets ASME B18.3 specifications for dimensional accuracy and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industry-standard reliability.
