S-90273A548 1/4"-20 x 1 3/4" ASME B18.6.3 Steel Phillips Flat Head Screws
Steel Phillips Flat Head 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, ensuring long-lasting performance in demanding industrial environments.
- High tensile strength of 60,000 psi provides reliable fastening for heavy-duty applications, reducing the risk of mechanical failure.
- Fully threaded design and Class 2A thread fit ensure consistent engagement and easy installation, saving time on assembly lines.
- 82° countersink angle and flat head profile allow for a flush, secure fit that minimizes protrusion and improves safety.
- Phillips drive (No. 3 size) offers efficient torque transfer and reduces cam-out, enhancing installation precision.
- Coarse UNC threads enable quick assembly and strong holding power in various materials, boosting productivity.
- Compliance with ASME B18.6.3, RoHS 3, and REACH guarantees adherence to industry standards and environmental safety, supporting global supply chain requirements.
Professional Applications & Engineering Value
This 1/4-20 UNC flat head Phillips screw is engineered from zinc-plated steel to address common industrial challenges such as vibration loosening and environmental wear. The fully threaded coarse design ensures maximum grip in wood, metal, and plastic substrates, ideal for machinery, automotive assemblies, and construction projects where durability is critical. The 82° countersink angle facilitates seamless, flush mounting, reducing snag hazards and maintaining aesthetic integrity. With a Rockwell B70 hardness and high tensile strength, it withstands heavy loads and repetitive stress, making it a dependable choice for industrial fastening solutions that prioritize safety and longevity.
Specification Summary & Compliance
This screw features precise Class 2A thread fit and UNC coarse threads with a diameter of 0.25" and length of 1-3/4", manufactured to ASME B18.6.3 specifications for dimensional accuracy. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets environmental and safety standards for global industrial use.
