S-90272A537 1/4"-20 x 1/2" 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
- Excellent driving torque transmission through Phillips No. 3 drive design, reducing cam-out and tool slippage
- High tensile strength of 60,000 psi ensures reliable performance under substantial mechanical loads
- Rockwell B70 hardness provides exceptional durability and resistance to wear during installation
- Class 2A thread fit with UNC coarse threading enables quick assembly and secure fastening in various materials
- Fully threaded design offers maximum grip length and uniform stress distribution
- Standard pan head profile provides a balanced combination of bearing surface and low-profile appearance
Professional Applications & Engineering Value
These zinc-plated steel rounded head screws deliver exceptional engineering value across industrial applications where corrosion resistance and mechanical reliability are paramount. The UNC coarse threading ensures rapid installation in metal assemblies, wood components, and plastic fixtures, while the Phillips No. 3 drive accommodates high-torque applications without stripping. The combination of 60,000 psi tensile strength and Rockwell B70 hardness makes these fully threaded screws ideal for machinery assembly, electrical enclosures, automotive components, and structural frameworks where vibration resistance and long-term performance are critical. The standard pan head design provides sufficient bearing surface while maintaining a professional finished appearance.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit tolerance for consistent performance. Complies with ASME B18.6.3 specifications for dimensional accuracy and mechanical properties. Meets RoHS 3 (2015/863/EU) compliance for restricted substances and REACH (EC 1907/2006) regulations for chemical safety. Features 1/4"-20 UNC coarse threads with right-hand direction and standard pan head profile with 0.492" diameter and 0.175" height.
