S-90471A160 4-40 x 3/8" 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-plated steel construction, ensuring long-term reliability in harsh industrial environments
- Optimized fastening efficiency with fully threaded UNC coarse spacing, providing quick installation and secure holding power
- Enhanced durability from Rockwell B70 hardness, maintaining structural integrity under repeated stress and vibration
- Flush surface finish with standard 100° countersink angle, allowing seamless integration without protrusion in precision assemblies
- Reliable drive engagement via Phillips No. 1 head, reducing slippage and tool wear during high-torque applications
- Precision thread fit with Class 2A tolerance, ensuring consistent performance and interchangeability in automated production lines
- Regulatory compliance assurance meeting ASME B18.6.3, RoHS 3, and REACH standards for global supply chain compatibility
Professional Applications & Engineering Value
These 4-40 UNC zinc-plated steel flat head screws deliver critical solutions for industrial fastening challenges where corrosion resistance, space constraints, and vibration tolerance are paramount. The fully threaded coarse spacing enables rapid assembly in sheet metal, electronics enclosures, and machinery components, while the 100° countersink angle ensures flush mounting to prevent snagging in conveyor systems or moving parts. Engineered with Rockwell B70 hardness, they withstand mechanical stress in automotive controls, HVAC assemblies, and robotic fixtures without thread deformation. The Phillips drive design combined with Class 2A thread fit guarantees precise torque transmission for high-volume manufacturing, reducing rework rates and maintenance downtime.
Specification Summary & Compliance
Manufactured to ASME B18.6.3 specifications with Class 2A thread fit and UNC coarse threading for consistent dimensional accuracy. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety in global industrial applications.
