S-91249A385 5/16"-18 x 1" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with Black-Oxide coated 18-8 Stainless Steel, ideal for harsh environments and reducing replacement costs.
• High tensile strength of 70,000 psi ensures reliable performance under heavy loads and vibration, minimizing failure risks.
• Rockwell B70 hardness provides superior durability and resistance to wear, extending service life in demanding applications.
• Fully threaded UNC coarse spacing offers quick installation and excellent holding power in various materials.
• Class 2A thread fit guarantees consistent, easy assembly and interchangeability with standard nuts and components.
• Phillips No. 4 drive allows for efficient, secure fastening with common tools, speeding up production workflows.
• Compliance with ASME B18.6.3, RoHS 3, and REACH ensures adherence to industry standards and environmental safety, supporting global supply chain requirements.

Professional Applications & Engineering Value

These Black-Oxide 18-8 Stainless Steel Rounded Head Screws are engineered to address common industrial challenges, such as corrosion in humid or chemical-exposed settings. The pan head style with a rounded profile distributes pressure evenly, reducing surface damage and providing a secure fit in assemblies. Featuring a 5/16"-18 UNC coarse thread and fully threaded design, they deliver rapid installation and robust clamping force in metal, wood, or plastic components. Ideal for machinery, automotive, and construction applications, these screws combine high tensile strength and corrosion resistance to minimize maintenance downtime and enhance operational reliability, making them a cost-effective choice for B2B procurement in demanding environments.

Specification Summary & Compliance

This product adheres to precise dimensional tolerances, including a Class 2A thread fit for consistent performance and a 1" length with standard UNC coarse thread spacing. It meets ASME B18.6.3 specifications for mechanical and material requirements, ensuring reliability in industrial fastening. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental safety and suitability for global markets.