S-90272A121 4-40 x 2" ASME B18.6.3 Steel Pan Head Phillips Screws
Steel Pan Head Phillips Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
- Excellent holding power provided by coarse UNC threading and 60,000 psi tensile strength for secure fastening
- Optimized drive engagement with No. 1 Phillips drive style preventing cam-out and ensuring efficient installation
- Reliable thread compatibility through Class 2A thread fit maintaining consistent engagement with mating components
- Enhanced durability with Rockwell B70 hardness providing resistance to wear and deformation
- Versatile rounded pan head design offering low-profile seating and improved aesthetic appearance
- Full threading along 2" length enabling maximum adjustment flexibility and grip depth
Professional Applications & Engineering Value
These 4-40 UNC zinc-plated steel screws deliver exceptional performance in industrial assembly applications where corrosion resistance and mechanical strength are critical. The combination of coarse thread spacing and fully threaded design ensures rapid installation and superior pull-out resistance in materials ranging from metals to plastics. The rounded pan head profile with Phillips drive provides a balanced solution for applications requiring flush mounting without sharp edges, while the zinc plating creates a protective barrier against oxidation in humid or outdoor environments. Engineered to maintain integrity under vibration and load cycles, these screws solve common fastening challenges in machinery, electrical enclosures, and equipment manufacturing where 60,000 psi tensile strength and consistent thread engagement are essential for long-term reliability.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit tolerance ensuring consistent mating with corresponding nuts and threaded holes. These rounded head screws comply with ASME B18.6.3 specifications for dimensional accuracy and performance requirements. The product meets RoHS 3 (2015/863/EU) compliance for restricted substance control and REACH (EC 1907/2006) regulations regarding chemical safety, making them suitable for global industrial applications with strict environmental and safety standards.
