S-90279A581 5/16"-18 x 3/4" ASME B18.6.3 Steel Round Head Phillips Screws
Steel Round Head Phillips 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
- High tensile strength of 60,000 psi ensures reliable performance under heavy loads and vibration
- Rockwell B69 hardness provides excellent wear resistance and durability
- Full UNC coarse threading delivers faster installation and superior holding power
- Class 2A thread fit guarantees consistent, reliable engagement with standard nuts
- Phillips No. 3 drive offers secure tool engagement and efficient installation
- Rounded head design provides a finished appearance while reducing snagging hazards
Professional Applications & Engineering Value
These zinc-plated steel rounded head Phillips screws are engineered to solve critical fastening challenges in industrial applications. The combination of 60,000 psi tensile strength and Rockwell B69 hardness ensures reliable performance in high-stress environments where vibration resistance is crucial. The full UNC coarse threading provides superior pull-out resistance in materials like steel and aluminum, while the zinc plating offers essential corrosion protection for outdoor equipment, machinery, and structural assemblies. The rounded head profile minimizes protrusion risks in applications where worker safety and clean aesthetics are priorities, making these screws ideal for manufacturing equipment, automotive components, and construction frameworks requiring durable, compliant fastening solutions.
Specification Summary & Compliance
This 5/16"-18 x 3/4" rounded head Phillips screw features precise Class 2A thread fit with UNC coarse thread spacing and right-hand threading. Manufactured to ASME B18.6.3 specifications for dimensional accuracy and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across industrial sectors while maintaining the specified mechanical properties of 60,000 psi tensile strength and Rockwell B69 hardness.
