S-90272A105 4-40 x 3/16" ASME B18.6.3 Steel Pan Head Phillips Screws
Steel Pan Head Phillips 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 harsh environments
- Enhanced durability with Rockwell B70 hardness rating to withstand high-stress assembly applications
- Optimized thread engagement through Class 2A thread fit ensuring secure fastening and vibration resistance
- Efficient installation with Phillips No. 1 drive design providing reliable torque transfer and reduced cam-out risk
- Full-thread coverage along the 3/16" length for maximum grip strength and load distribution
- Regulatory compliance with ASME B18.6.3 manufacturing standards for consistent quality and performance
- Environmental safety through RoHS 3 and REACH compliance for use in regulated industries
Professional Applications & Engineering Value
These 4-40 UNC zinc-plated steel rounded head screws deliver critical performance advantages in industrial assembly where corrosion resistance and mechanical reliability are paramount. The coarse UNC thread pattern combined with Class 2A thread fit ensures rapid installation and secure fastening in materials prone to stripping. The zinc-plated steel construction provides essential protection against oxidation and chemical exposure, while the pan head profile with Phillips drive offers flush mounting and accessible drive engagement. Engineered to ASME B18.6.3 specifications, these fully threaded screws maintain consistent performance in electronics, machinery, and automotive applications where vibration resistance and long-term fastener integrity are required.
Specification Summary & Compliance
Manufactured to ASME B18.6.3 standards with Class 2A thread fit tolerance for precision threading. Features 4-40 UNC coarse threads with fully threaded 3/16" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Material certification includes zinc-plated steel construction with Rockwell B70 hardness rating.
