S-90272A403 1/4"-20 x 4 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
- Exceptional corrosion resistance with zinc-plated steel construction, extending service life in demanding industrial environments.
- Superior holding power from fully threaded UNC coarse spacing, ensuring reliable fastening in wood, metal, and composite materials.
- High tensile strength of 60,000 psi provides dependable load-bearing capacity for heavy-duty construction and machinery applications.
- Rockwell B70 hardness offers excellent resistance to wear and deformation under stress, maintaining fastener integrity.
- Easy installation and removal with No. 3 Phillips drive and rounded pan head design, reducing assembly time and tool slippage.
- Precise Class 2A thread fit ensures smooth engagement and consistent performance with standard nuts and tapped holes.
- Broad regulatory compliance including ASME B18.6.3, RoHS 3, and REACH, guaranteeing safety and environmental standards for global supply chains.
Professional Applications & Engineering Value
Engineered for demanding industrial and construction settings, this zinc-plated steel rounded head Phillips screw addresses critical challenges like vibration loosening and environmental degradation. The fully threaded 1/4"-20 UNC coarse spacing maximizes grip in soft materials and provides rapid assembly, while the 60,000 psi tensile strength and Rockwell B70 hardness ensure durability under dynamic loads. Ideal for machinery, structural frameworks, and equipment manufacturing, its pan head design and Phillips drive facilitate secure fastening without countersinking, reducing installation errors. The zinc plating adds a protective barrier against rust, making it suitable for outdoor or humid conditions, enhancing longevity in heavy-duty fastener applications.
Specification Summary & Compliance
This screw features a 1/4"-20 UNC thread with Class 2A fit for precise dimensional accuracy and reliable mating with standard components. Manufactured in accordance with ASME B18.6.3 specifications, it ensures consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to environmental and safety standards for industrial use.
