S-90275A550 1/4"-20 x 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 holding power with 60,000 psi tensile strength and Rockwell B70 hardness for reliable fastening in heavy-duty applications
- Easy installation and removal through standard slotted drive design compatible with common tools
- Optimized thread engagement with UNC coarse threading and Class 2A fit ensuring secure connections and vibration resistance
- Flush mounting capability with 82° countersink angle and flat head design for smooth surface finishes
- Full thread coverage along the 2" length provides maximum grip strength across the entire fastener
- Regulatory compliance assurance meeting ASME B18.6.3, RoHS 3, and REACH standards for quality and environmental safety
Professional Applications & Engineering Value
This zinc-plated steel flat head screw delivers critical performance where surface-flush fastening and high tensile strength are paramount. The combination of UNC coarse threading and Class 2A thread fit ensures rapid installation with excellent vibration resistance, making it ideal for assembly lines and maintenance operations. The 82° countersink angle provides secure seating in tapered holes, preventing protrusion in machinery, automotive components, and structural frameworks. With full threading along its 2" length, it offers maximum grip in wood, metal, and composite materials. The zinc plating creates a protective barrier against corrosion in industrial environments, while compliance with ASME B18.6.3 guarantees dimensional accuracy and interchangeability.
Specification Summary & Compliance
Manufactured to precise inch system dimensions with Class 2A thread fit tolerance for consistent performance. Features UNC coarse threads (1/4"-20) with right-hand direction and standard flat head profile. Complies with ASME B18.6.3 manufacturing specifications for dimensional accuracy. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors.
