S-90273A438 3/8"-16 x 3/4" ASME B18.6.3 Steel Phillips Flat Head Screws
Steel Phillips 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 zinc plating for extended service life in demanding industrial environments
- Exceptional holding power with 60,000 psi tensile strength and Rockwell B70 hardness for reliable fastening performance
- Quick installation and removal with standard Phillips No. 4 drive and fully threaded UNC coarse threading design
- Precise flush mounting thanks to the standard 82° countersink angle and flat head profile
- Consistent thread engagement ensured by Class 2A thread fit for reduced cross-threading risks
- Broad industrial compatibility with right-hand thread direction and 3/4" length for versatile applications
- Regulatory compliance assurance meeting ASME B18.6.3 standards and environmental regulations
Professional Applications & Engineering Value
These zinc-plated steel flat head screws deliver exceptional engineering value across industrial applications where flush surface mounting and corrosion resistance are critical. The combination of UNC coarse threading and Class 2A thread fit ensures rapid installation in various materials while minimizing stripping and cross-threading issues. The Phillips drive system with No. 4 size provides secure tool engagement, reducing slippage during high-torque applications. With 60,000 psi tensile strength and Rockwell B70 hardness, these screws maintain structural integrity under vibration and load stress, making them ideal for machinery assembly, electrical enclosures, and automotive components where reliability and regulatory compliance are paramount.
Specification Summary & Compliance
This 3/8"-16 UNC flat head screw features precise Class 2A thread fit per UNC standards with a coarse thread spacing of 16 TPI. Manufacturing specifications strictly adhere to ASME B18.6.3 standards for dimensional accuracy and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets. Critical dimensions include 0.717" head diameter, 3/4" length, and standard 82° countersink angle for proper flush mounting applications.
