S-97690A148 4-40 x 1/4" ASME B18.6.3 Steel Pan Head Torx Screws
Steel Pan Head Torx 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
- Enhanced torque transmission through T10 Torx drive that minimizes cam-out and tool slippage
- Optimized load distribution with rounded pan head design that reduces surface damage during installation
- Reliable thread engagement with Class 2A coarse UNC threads ensuring consistent fastening performance
- Exceptional mechanical strength backed by Rockwell B70 hardness rating for heavy-duty applications
- Complete fastening coverage through fully threaded design for maximum grip length utilization
- Industry compliance assurance meeting ASME B18.6.3 standards and environmental regulations
Professional Applications & Engineering Value
These 4-40 UNC zinc-plated steel rounded head screws deliver critical performance advantages for industrial assembly operations. The Torx T10 drive system provides superior torque transfer compared to conventional drives, significantly reducing fastener damage during high-torque applications. With Rockwell B70 hardness and coarse thread design, these fasteners maintain structural integrity under vibration and dynamic loads common in machinery, electronics, and automotive components. The black-painted pan head offers both aesthetic consistency and additional corrosion protection, while the fully threaded configuration ensures maximum holding power across the entire 1/4" length. Engineered to withstand rigorous industrial environments, these screws solve common challenges of fastener failure, installation inefficiency, and compliance requirements.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit tolerance for consistent mating with corresponding nuts and threaded components. These right-hand threaded screws conform to ASME B18.6.3 specifications for mechanical fasteners and demonstrate compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The UNC coarse thread profile with 4-40 thread size ensures reliable performance in various materials, supported by the zinc-plated steel construction that meets industrial durability requirements.
