S-90275A602 5/16"-18 x 4 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
- Reliable thread engagement with Class 2A coarse UNC threads ensuring secure fastening and vibration resistance
- Streamlined flush mounting with standard 82° countersink angle for smooth surface finishes
- Universal compatibility with standard slotted drive tools for easy installation and maintenance
- Full-threaded design providing maximum grip length and holding power across the entire fastener
- Regulatory compliance assurance meeting industry standards for quality and environmental safety
Professional Applications & Engineering Value
This 5/16"-18 UNC flat head screw delivers critical engineering solutions where flush surface mounting and high tensile strength are paramount. The zinc-plated steel construction provides essential corrosion protection for industrial equipment, machinery assemblies, and structural applications exposed to harsh conditions. The Class 2A coarse thread design ensures rapid installation and superior vibration resistance, while the 82° countersink angle creates seamless transitions in metal, wood, and composite materials. With full threading along its 4-1/2" length, this fastener maximizes contact area for enhanced load distribution, making it ideal for heavy machinery, construction frameworks, and manufacturing equipment where reliability cannot be compromised.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit tolerances with UNC coarse thread specifications (5/16"-18). Complies with ASME B18.6.3 manufacturing standards for dimensional accuracy and performance. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance requirements. Features standard 82° countersink angle and slotted drive configuration for industry-standard compatibility.
