S-90471A250 8-32 x 1/4" ASME B18.6.3 Steel Phillips Flat Head Screws
Steel Phillips 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 that protects against rust and extends service life in demanding environments
- Exceptional holding power from 60,000 psi tensile strength and Rockwell B70 hardness, ensuring reliable fastening under stress
- Maximum thread engagement with fully threaded design for enhanced grip and vibration resistance in assemblies
- Precise installation control using standard Phillips No. 2 drive, reducing cam-out risks and improving assembly efficiency
- Wide compatibility with Class 2A coarse UNC threads that provide quick assembly and reliable performance in various materials
- Flush mounting capability with 100° countersink angle and flat head design for seamless, unobtrusive surface finishes
- Regulatory confidence through compliance with ASME B18.6.3, RoHS 3, and REACH, ensuring safety and environmental standards are met
Professional Applications & Engineering Value
These 8-32 UNC flat head screws deliver critical engineering solutions where vibration resistance and corrosion protection are paramount. The zinc-plated steel construction combats environmental degradation in industrial settings, while the fully threaded design and coarse thread spacing ensure rapid installation and superior retention in metal, plastic, and wood assemblies. The flat head profile with 100° countersink allows for flush mounting in machinery, electronics enclosures, and automotive components, eliminating protrusions that could interfere with operation. With 60,000 psi tensile strength, they address common failure points in high-stress applications, providing engineers with a dependable fastening solution that maintains integrity over time.
Specification Summary & Compliance
This product maintains Class 2A thread fit tolerances per UNC standards, ensuring consistent engagement and interchangeability. Manufacturing and dimensional compliance is verified under ASME B18.6.3 specifications. Environmental and safety adherence is confirmed through RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, guaranteeing restricted substance limits are met for global supply chain integration.
