S-90275A646 3/8"-16 x 5 1/2" ASME B18.6.3 Steel Slotted Flat Head Screws
Steel Slotted 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-plated steel construction for extended service life in demanding environments
- Exceptional load-bearing capacity with 60,000 psi tensile strength and Rockwell B70 hardness for heavy-duty applications
- Precise thread engagement with Class 2A UNC coarse threads ensuring reliable fastening and vibration resistance
- Optimal flush mounting with standard 82° countersink angle and flat head design for seamless surface integration
- Full-length threading provides maximum grip strength and uniform stress distribution along the entire fastener
- Industry-standard compliance meeting ASME B18.6.3 specifications for guaranteed dimensional accuracy and performance
- Environmental regulation adherence with RoHS 3 and REACH compliance for safe, sustainable industrial use
Professional Applications & Engineering Value
This zinc-plated steel flat head screw delivers critical engineering solutions for industrial assembly challenges. The combination of 60,000 psi tensile strength and Rockwell B70 hardness ensures reliable performance in structural applications where vibration resistance and load capacity are paramount. The UNC coarse threading with Class 2A fit provides rapid installation and secure fastening in metal-to-metal applications, while the 82° countersink angle creates flush surfaces essential for machinery, equipment manufacturing, and automotive assemblies. The full threading maximizes engagement depth, distributing stress evenly to prevent joint failure in high-stress environments. These industrial flat head screws are engineered to maintain integrity under continuous operational demands.
Specification Summary & Compliance
Manufactured to precise inch system dimensions with Class 2A thread fit tolerances and UNC coarse thread profile. Complies with ASME B18.6.3 mechanical standards for dimensional accuracy and performance. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for hazardous substance restrictions. Features standard flat head profile with 82° countersink angle and right-hand thread direction for universal industrial compatibility.
