S-91771A583 5/16"-18 x 1" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction, ensuring long-term reliability in harsh industrial environments.
• Exceptional tensile strength of 80,000 psi provides reliable fastening for heavy-duty applications, reducing the risk of mechanical failure.
• Rockwell B80 hardness offers excellent durability and resistance to wear, extending the screw's service life under repetitive stress.
• Fully threaded design with Class 2A coarse UNC threads ensures easy installation and secure grip in various materials, minimizing assembly time.
• Standard 82° countersink angle and flat head profile allows for flush mounting, enhancing aesthetic appeal and preventing snagging in machinery.
• Compliance with ASME B18.6.3 standards guarantees precise dimensions and consistent performance, meeting rigorous engineering requirements.
• RoHS 3 and REACH compliance ensures environmental safety and regulatory adherence, making it suitable for global industrial supply chains.

Professional Applications & Engineering Value

Engineered for demanding industrial settings, these 5/16"-18 UNC flat head Phillips screws address common challenges like corrosion and vibration loosening. The passivated 18-8 stainless steel material provides robust resistance to moisture and chemicals, ideal for applications in marine, automotive, and food processing equipment. With a coarse thread and Class 2A fit, they offer quick, secure fastening in metals and plastics, reducing installation errors. The fully threaded design and 82° countersink angle ensure a tight, flush fit, preventing protrusions in assembly lines. These screws deliver reliable performance in machinery, enclosures, and structural frameworks, where high tensile strength and compliance with ASME B18.6.3 standards are critical for safety and efficiency.

Specification Summary & Compliance

This screw features precise Class 2A thread fit and UNC coarse threading with a 5/16"-18 size, ensuring dimensional accuracy per ASME B18.6.3 specifications. It 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.