S-90044A427 5/16"-18 x 9/16" ASME B18.3, ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Superior tensile strength of 170,000 psi ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
• Exceptional durability from Rockwell C37 hardness and Black-Oxide Alloy Steel construction, offering long service life and resistance to wear.
• Precise Class 3A thread fit provides tight, secure fastening with minimal backlash, ideal for precision assemblies.
• Corrosion-resistant Black-Oxide finish enhances protection against rust and environmental factors, extending usability in harsh conditions.
• Easy installation and removal with a 1/4" hex drive and standard socket head, allowing for efficient maintenance with common tools.
• Full threading ensures consistent grip along the entire 9/16" length, facilitating versatile mounting in various materials.
• Compliance with industry standards like ASME B18.3 and ASTM A574 guarantees quality and interoperability in professional settings.

Professional Applications & Engineering Value

This Socket Head Cap Screw is engineered from Black-Oxide Alloy Steel to address common industrial challenges such as vibration loosening and corrosion in demanding environments. The 5/16"-18 coarse thread and Class 3A fit provide superior clamping force and alignment in machinery, automotive, and aerospace assemblies, reducing maintenance downtime. Its high tensile strength and Rockwell C37 hardness ensure it withstands heavy loads and repetitive stress, while the right-hand UNRC thread design offers reliable fastening in dynamic applications. Ideal for use in equipment requiring corrosion-resistant and durable fasteners, this screw delivers consistent performance in harsh conditions, enhancing overall system reliability.

Specification Summary & Compliance

This product features precise dimensions including a 9/16" length, 1/4" hex drive, and 5/16"-18 coarse thread with Class 3A thread fit for high accuracy. It complies with ASME B18.3 and ASTM A574 specifications, ensuring consistent manufacturing quality. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for industrial use.