S-90272A322 4-40 x 1 1/16" 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 demanding environments
- High tensile strength of 60,000 psi ensures reliable fastening performance under substantial mechanical stress
- Class 2A thread fit provides consistent, reliable engagement while maintaining easy assembly
- Rockwell B70 hardness rating delivers excellent durability and resistance to wear during installation and use
- Fully threaded design maximizes grip length and provides uniform clamping force across the entire fastener
- Phillips No. 1 drive system offers familiar, efficient installation with standard tools
- Coarse UNC threading enables quick assembly and reduced cross-threading risks in industrial applications
Professional Applications & Engineering Value
These 4-40 UNC zinc-plated steel rounded head screws deliver exceptional performance in demanding industrial environments where corrosion resistance and mechanical reliability are critical. The pan head profile with Phillips drive provides a low-profile fastening solution that distributes clamping force effectively while remaining accessible for maintenance. The fully threaded coarse UNC design ensures rapid installation in sheet metal, machinery, and electronic enclosures where vibration resistance and consistent thread engagement are essential. The zinc-plated finish creates a protective barrier against moisture and chemical exposure, significantly extending service life in manufacturing facilities, outdoor equipment, and electrical assemblies where environmental factors would compromise ordinary fasteners.
Specification Summary & Compliance
This fastener maintains precise Class 2A thread fit tolerances with UNC coarse threading (4-40 size) and 1-1/16" length for consistent performance. Manufactured to ASME B18.6.3 specifications, these screws ensure dimensional accuracy and interchangeability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making them suitable for global industrial applications requiring strict material restrictions.
