S-90275A541 1/4"-20 x 7/8" 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 mechanical strength with 60,000 psi tensile strength and Rockwell B70 hardness for reliable load-bearing performance
- Precision flush mounting with 82° countersink angle and flat head design for seamless surface integration
- Optimized thread engagement through UNC coarse threading and Class 2A fit ensuring secure fastening in various materials
- Full-threaded design providing maximum grip length and uniform stress distribution across the entire fastener
- Industry-standard compliance meeting ASME B18.6.3 specifications for dimensional accuracy and performance reliability
- Environmental responsibility with RoHS 3 and REACH compliance for sustainable manufacturing practices
Professional Applications & Engineering Value
Engineered for industrial machinery, automotive assemblies, and electrical enclosures, these zinc-plated steel flat head screws deliver critical performance where flush surface mounting and vibration resistance are paramount. The 1/4"-20 UNC coarse thread configuration ensures rapid installation and superior holding power in both metallic and composite materials, while the 82° countersink angle provides optimal seating in precision-machined applications. The combination of 60,000 psi tensile strength and Rockwell B70 hardness addresses common failure points in high-stress environments, making these fully threaded fasteners ideal for applications requiring consistent clamping force and long-term structural integrity.
Specification Summary & Compliance
This flat head screw features precision Class 2A thread fit with UNC coarse threading and dimensional compliance with ASME B18.6.3 manufacturing standards. The product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulatory requirements, ensuring environmental compliance for global industrial applications. Manufactured to inch system specifications with right-hand threading and standard flat head profile for consistent performance across assembly operations.
