S-90273A450 1/2"-13 x 3" 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-plated steel construction, extending service life in harsh industrial environments
- High tensile strength of 60,000 psi ensures reliable fastening under heavy loads and vibration
- Class 2A thread fit provides consistent assembly performance and reduces cross-threading risks
- 82° countersink angle enables flush mounting for cleaner aesthetics and reduced snag hazards
- Partial threading design offers optimal grip strength while minimizing material stress concentration
- Phillips No. 4 drive delivers efficient torque transfer during installation with common tooling
- Rockwell B70 hardness maintains thread integrity through repeated installation cycles
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these zinc-plated steel flat head screws solve critical fastening challenges where surface flushness and corrosion resistance are paramount. The 1/2"-13 UNC coarse thread configuration provides rapid installation in metal assemblies, while the partial threading prevents joint loosening under dynamic loads. The 82° countersink angle ensures seamless integration into precision machinery, electrical enclosures, and structural frameworks where protrusion-free surfaces are essential. These heavy-duty fasteners maintain consistent performance in manufacturing equipment, automotive assemblies, and construction applications where Rockwell B70 hardness and 60,000 psi tensile strength prevent stripping and failure.
Specification Summary & Compliance
Manufactured to ASME B18.6.3 specifications with Class 2A thread fit tolerance for precision assembly. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. Features right-hand coarse threads with 1/2"-13 UNC threading and 3" length with minimum 1 1/2" thread length. Standard flat head profile with Phillips No. 4 drive for compatibility with industrial driving tools.
