S-90272A818 5/16"-18 x 1 1/4" 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 coating, extending service life in harsh industrial environments
- High tensile strength of 60,000 psi ensures reliable fastening under substantial mechanical loads
- Rockwell B70 hardness provides excellent wear resistance and maintains thread integrity during repeated installations
- Class 2A thread fit with UNC coarse threading offers easier assembly and reduced cross-threading risks
- Phillips No. 4 drive design enables efficient installation with common tools while minimizing cam-out
- Fully threaded shank delivers maximum grip length and uniform clamping force across the entire engagement
- Standard pan head profile combines low-profile appearance with practical bearing surface for secure fastening
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these zinc-plated steel pan head screws solve critical fastening challenges where corrosion resistance and structural integrity are paramount. The UNC coarse thread configuration prevents binding in soft materials and allows for rapid assembly in production environments. With 60,000 psi tensile strength and Rockwell B70 hardness, these fasteners maintain clamping force under vibration and dynamic loads, making them ideal for machinery, equipment assembly, and structural frameworks. The Phillips drive system provides familiar, efficient installation while the zinc plating creates a protective barrier against oxidation in humid or outdoor conditions, significantly extending service life and reducing maintenance frequency.
Specification Summary & Compliance
This 5/16"-18 x 1-1/4" pan head screw features precise Class 2A thread fit tolerances with UNC coarse thread spacing (18 TPI) and right-hand threading. Manufactured to ASME B18.6.3 specifications, ensuring dimensional accuracy and interchangeability. The product is fully compliant with RoHS 3 (2015/863/EU) environmental directives and REACH (EC 1907/2006) regulations regarding hazardous substances, making it suitable for global industrial supply chains and environmentally conscious manufacturing operations.
