S-92210A545 1/4"-20 x 1 3/8" 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
- Superior corrosion resistance with 18-8 stainless steel and passivated finish, ensuring longevity in harsh environments.
- High tensile strength of 70,000 psi provides reliable fastening for demanding industrial applications.
- Precise Class 3A thread fit guarantees secure, vibration-resistant connections with minimal risk of loosening.
- 82° countersink angle and flat head design allow for flush mounting, reducing snagging and improving aesthetics.
- Hex drive (5/32") compatibility enables easy installation and removal with standard tools, saving time on assembly lines.
- Full threading and coarse UNC thread ensures quick engagement and strong holding power in various materials.
- Compliance with ASME B18.3, RoHS 3, and REACH assures adherence to industry standards and environmental safety regulations.
Professional Applications & Engineering Value
These 1/4-20 UNC flat head screws are engineered to address common industrial challenges, such as corrosion-induced failure and assembly inefficiency. Made from 18-8 stainless steel with a passivated finish, they resist rust and chemical exposure in environments like marine, food processing, and outdoor machinery. The Class 3A thread fit and coarse threading provide quick, secure fastening in metals and plastics, reducing installation time while maintaining high tensile strength. Ideal for applications requiring flush surfaces, the flat head with 82° countersink minimizes protrusion, enhancing safety and streamlining designs in automotive, construction, and electronics assemblies.
Specification Summary & Compliance
This screw features a 1/4"-20 UNC coarse thread with Class 3A fit for precise tolerance, ensuring consistent performance in high-vibration settings. Manufactured to ASME B18.3 specifications, it includes a fully threaded design, right-hand direction, and dimensions such as 1-3/8" length and 5/32" hex drive. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), it meets environmental and safety standards, supporting sustainable industrial practices without compromising on Rockwell B55 hardness or durability.
