S-92220A226 5/16"-18 x 1 3/4" ASTM A574 Alloy Steel Low-Profile Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional strength and durability with 140,000 psi tensile strength and Rockwell C39 hardness, ensuring reliable performance in demanding applications.
• Superior corrosion resistance provided by the black-oxide finish, extending the fastener's service life in harsh industrial environments.
• Precise and secure fastening with Class 3A thread fit, offering tighter tolerances for improved assembly integrity and vibration resistance.
• Space-saving low-profile head design allows for use in confined spaces where standard socket heads may not fit.
• Optimized for efficient installation using a 5/32" hex drive, enabling quick and easy torque application with common tools.
• Versatile partially threaded shank provides a strong grip on materials while allowing for unthreaded sections to act as a pilot or guide.
• Compliance with major industry standards including ASTM A574, RoHS 3, and REACH, ensuring material quality and environmental safety.

Professional Applications & Engineering Value

This 5/16"-18 UNC low socket head cap screw is engineered from black-oxide alloy steel to address common industrial challenges such as space constraints and exposure to corrosive elements. The low-profile head is ideal for machinery, automotive assemblies, and precision equipment where clearance is limited. Its coarse UNC thread and Class 3A fit ensure rapid installation and high resistance to loosening under vibration, reducing maintenance needs. The partially threaded design allows the unthreaded portion to bear loads without damaging threads, enhancing joint strength. With a 140,000 psi tensile strength, it supports heavy-duty applications in construction, aerospace, and manufacturing, providing long-term reliability and reducing downtime.

Specification Summary & Compliance

This fastener features a 5/16"-18 UNC coarse thread with Class 3A thread fit for precise dimensional accuracy, ensuring consistent performance. It is manufactured in accordance with ASTM A574 specifications, guaranteeing material and mechanical properties. The product is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and safe for various industrial uses.