S-90275A589 5/16"-18 x 1 3/4" 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 plating for extended service life in demanding environments
- High tensile strength of 60,000 psi ensures reliable performance under heavy loads and vibration
- Rockwell B70 hardness provides excellent durability and resistance to wear and deformation
- Class 2A thread fit offers consistent, reliable engagement for simplified assembly and maintenance
- 82° countersink angle enables flush mounting for clean, professional finishes in visible applications
- Fully threaded design maximizes grip length and load distribution across the entire fastener
- Slotted drive compatibility allows for quick installation with standard tools while maintaining cost-effectiveness
Professional Applications & Engineering Value
This zinc-plated steel flat head screw delivers exceptional engineering value across industrial applications where reliability and compliance are paramount. The combination of UNC coarse threading and Class 2A thread fit ensures rapid installation and secure fastening in metal fabrication, machinery assembly, and structural components. The 82° countersink angle provides seamless flush mounting in countersunk holes, eliminating protrusions that could interfere with moving parts or compromise safety. Manufactured from high-strength steel with Rockwell B70 hardness, these screws maintain integrity under vibration and heavy loads, while the zinc plating offers essential corrosion protection for extended service life in harsh industrial environments.
Specification Summary & Compliance
This fastener features precision 5/16"-18 UNC coarse threads with Class 2A thread fit tolerance for consistent performance. The 1-3/4" length and fully threaded design provide maximum engagement strength. Manufacturing complies with ASME B18.6.3 specifications for dimensional accuracy and performance standards. The product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance requirements, ensuring environmental responsibility and regulatory adherence for industrial applications worldwide.
