S-90585A998 1/2"-13 x 5" 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 316 stainless steel construction, ideal for harsh industrial environments and chemical exposure
- Exceptional mechanical strength delivering 70,000 psi tensile strength and Rockwell B55 hardness for reliable, heavy-duty load-bearing applications
- Precise Class 3A thread fit ensures tight, secure fastening with minimal backlash in critical assemblies
- Enhanced durability through passivated surface treatment, providing added protection against oxidation and extending service life
- Optimized drive engagement with 5/16" hex drive for high-torque installation and reduced risk of stripping
- Full UNC coarse threading along the entire 5" length enables faster installation and superior grip in a wide range of materials
- Regulatory compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards for quality and environmental safety
Professional Applications & Engineering Value
Engineered for demanding environments, these 316 stainless steel flat head screws combine high tensile strength and corrosion resistance to solve critical fastening challenges in marine, chemical processing, and outdoor infrastructure. The UNC coarse thread and fully threaded design provide rapid installation and maximum holding power in soft materials or where vibration resistance is essential. With a passivated finish and hex drive, they withstand aggressive conditions while enabling secure, high-torque tightening. Ideal for heavy-duty industrial fasteners in structural assemblies, machinery, and equipment requiring Class 3A precision and long-term reliability under stress.
Specification Summary & Compliance
This 1/2"-13 UNC flat head screw features a Class 3A thread fit per ASME B18.3, ensuring precise dimensional accuracy and interchangeability. Manufacturing adheres to ASME B18.3 specifications with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations. The inch system dimensions include a 5" length, 82° countersink angle, and coarse thread spacing, providing consistent performance in standardized industrial applications.
