S-90585A540 1/4"-20 x 3/4" 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 and passivated finish, ideal for harsh environments and chemical exposure
- Exceptional mechanical strength delivering 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance under heavy loads
- Precision thread engagement with Class 3A thread fit ensuring secure fastening and vibration resistance in critical assemblies
- Optimized flush mounting featuring standard 82° countersink angle and flat head design for smooth surface finishes
- Enhanced installation efficiency through hex drive (5/32") design allowing high-torque application with standard tools
- Full-threaded reliability providing consistent clamping force along the entire 3/4" length for uniform stress distribution
- Regulatory compliance assurance meeting ASME B18.3 specifications while being RoHS 3 and REACH compliant for global applications
Professional Applications & Engineering Value
Engineered for demanding industrial environments, these 1/4"-20 UNC flat head screws in 316 stainless steel solve critical corrosion and strength challenges. The passivated finish significantly enhances surface stability, preventing galvanic corrosion in marine, chemical processing, and food-grade applications. With Class 3A thread fit and fully threaded design, they maintain clamping force in high-vibration machinery while the 82° countersink angle ensures flush mounting in precision assemblies. The hex drive configuration allows for secure installation in confined spaces, making these industrial fasteners ideal for structural components, equipment manufacturing, and maintenance operations where reliability is paramount.
Specification Summary & Compliance
These flat head screws feature precision UNC coarse threading with Class 3A thread fit tolerance for superior engagement. Manufacturing complies with ASME B18.3 standards ensuring dimensional accuracy for head diameter (0.531"), length (3/4"), and drive size (5/32"). The components are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and material traceability for global supply chains.
