S-92210A173 1/4"-20 x 7" 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 for extended service life in harsh environments
- Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for reliable heavy-duty applications
- Precise Class 3A thread fit ensures secure, vibration-resistant connections and reduces assembly issues
- Optimized hex drive design (5/32") provides high torque transmission and prevents stripping during installation
- Standard 82° countersink angle allows for flush mounting and streamlined surface profiles
- Partially threaded shank combines strong grip with flexibility for varied material thicknesses
- Full regulatory compliance with ASME B18.3, RoHS 3, and REACH standards for guaranteed quality and safety
Professional Applications & Engineering Value
This 1/4"-20 UNC coarse thread flat head screw delivers critical performance where corrosion resistance and structural integrity are paramount. Engineered from 18-8 stainless steel with a passivated finish, it withstands aggressive industrial atmospheres, moisture, and chemicals, reducing maintenance and replacement costs. The hex drive and Class 3A thread fit ensure precise, high-torque installations in metal fabrication, machinery, and structural assemblies, minimizing loosening under dynamic loads. Its partially threaded design and 82° flat head provide versatile, flush-fastening solutions for panels, frames, and heavy equipment, enhancing both durability and aesthetic finish.
Specification Summary & Compliance
This flat head screw adheres to Class 3A thread tolerances per UNC coarse thread standards, ensuring precise fit and interchangeability. Manufacturing and material specifications comply with ASME B18.3 (ASTM F879), guaranteeing dimensional accuracy and performance reliability. The product is confirmed RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for industrial use.
