S-91500A591 5/16"-18 x 2" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws
Stainless 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 316 stainless steel construction, ideal for harsh environments and chemical exposure
- High tensile strength of 70,000 psi ensures reliable, long-lasting fastening in demanding applications
- Passivated finish enhances surface durability and provides an extra layer of protection against oxidation
- Rockwell B80 hardness offers excellent wear resistance and maintains thread integrity under stress
- 82° countersink angle allows for a clean, flush mount, reducing snagging and improving aesthetics
- Class 2A thread fit and UNC coarse threading enable quick, easy installation and secure holding power
- Full threading along the 2" length provides maximum grip and adjustability in various material thicknesses
Professional Applications & Engineering Value
These 316 stainless steel flat head screws are engineered to address critical challenges in industrial settings, such as exposure to corrosive agents and high mechanical stress. The passivated finish significantly extends service life by preventing rust and degradation, making them ideal for marine, chemical processing, and outdoor equipment. The UNC coarse thread and Phillips drive facilitate rapid assembly without sacrificing strength, while the 82° countersink ensures a smooth, embedded fit that minimizes protrusion and vibration loosening. This combination of corrosion resistance, high tensile strength, and precise thread fit delivers reliable performance in machinery, structural frameworks, and other heavy-duty applications where failure is not an option.
Specification Summary & Compliance
This product adheres to ASME B18.6.3 specifications, ensuring dimensional accuracy and performance reliability. The thread fit is Class 2A with UNC coarse threading (5/16"-18), providing standard tolerance for consistent engagement. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of hazardous substances and supporting environmental and safety standards in industrial procurement.
