S-90273A501 5/16"-18 x 2" 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 plating that protects against rust and extends service life in demanding environments
- Exceptional tensile strength rated at 60,000 psi ensures reliable performance under heavy loads and vibration
- Precise Class 2A thread fit provides smooth installation and secure fastening with consistent engagement
- 82° countersink angle design allows for flush mounting that eliminates protrusions and improves safety
- Rockwell B70 hardness maintains thread integrity and prevents stripping during repeated use
- Fully threaded coarse UNC pattern enables faster installation and stronger holding power in various materials
- Phillips drive compatibility offers widespread tool accessibility and efficient torque application
Professional Applications & Engineering Value
Engineered for industrial applications where reliable fastening and corrosion resistance are critical, these zinc-plated steel flat head screws solve common challenges in machinery assembly, structural frameworks, and equipment manufacturing. The 5/16"-18 UNC coarse thread configuration provides excellent pull-out resistance in softer materials while the 82° countersink angle ensures seamless surface integration. The combination of 60,000 psi tensile strength and Rockwell B70 hardness addresses vibration-induced loosening and material fatigue, making these Phillips drive screws ideal for applications requiring repeated maintenance access without compromising fastener integrity.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit tolerances with UNC coarse threading (5/16"-18) and standardized dimensions per ASME B18.6.3 specifications. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors. The 2" length and fully threaded design provide consistent performance while the zinc-plated steel construction meets industry standards for corrosion protection and durability.
