S-92703A207 4-40 x 5/16" ASME B18.3 Stainless Steel Torx Flat Head Screws
Stainless Steel Torx 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
- Enhanced torque transmission through Torx Plus IP8 drive, reducing cam-out risk and tool wear during installation
- High mechanical strength with 60,000 psi tensile strength and Rockwell B70 hardness for reliable performance under stress
- Precision thread engagement with Class 2A UNC coarse threads ensuring consistent fastening and vibration resistance
- Optimal flush mounting thanks to standard 82° flat head profile that sits neatly in countersunk applications
- Full thread coverage along the 5/16" length provides maximum grip and load distribution
- Regulatory compliance meeting ASME B18.3 specifications and RoHS/REACH environmental standards
Professional Applications & Engineering Value
These 4-40 UNC flat head screws with Torx Plus drive are engineered to solve critical fastening challenges in precision assemblies. The 18-8 stainless steel material combined with passivated finish provides exceptional resistance to corrosion and chemical exposure, making them ideal for electronics enclosures, medical devices, and marine equipment. The fully threaded design with coarse spacing ensures rapid installation and superior holding power in softer materials like aluminum or plastics. With their right-hand thread direction and standardized flat head profile, these screws deliver reliable performance in applications where vibration resistance and flush surface mounting are essential requirements.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit and UNC thread form ensuring interchangeability and consistent performance. These screws comply with ASME B18.3 mechanical specifications and maintain RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards. The combination of 0.112" thread diameter, 5/16" length, and standardized 82° countersink angle guarantees proper fit and function in industrial applications requiring reliable flat head fastening solutions.
