S-90044A530 3/8"-16 x 2 3/4" ASME B18.3, ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi for superior load-bearing capacity and resistance to mechanical failure in demanding applications.
• Enhanced corrosion resistance provided by the black-oxide finish on alloy steel, extending the screw's service life in various industrial environments.
• Precise Class 3A thread fit ensures reliable engagement and superior vibration resistance, minimizing the risk of loosening.
• High hardness rating (Rockwell C37) offers excellent wear resistance and durability, maintaining performance under repeated stress.
• Standard hex socket drive allows for high-torque installation and removal with common tools, facilitating efficient assembly and maintenance.
• Coarse UNRC threads enable quick and easy installation, reducing assembly time while providing strong holding power.
• Full threading along the 2-3/4" length provides maximum grip and adjustability across the entire fastener for versatile application use.

Professional Applications & Engineering Value

This socket head cap screw is engineered for high-stress applications where reliability is non-negotiable. The black-oxide alloy steel construction, combined with a Rockwell C37 hardness, provides exceptional resistance to wear and environmental factors, making it ideal for machinery, automotive assemblies, and heavy equipment. The Class 3A thread fit and coarse UNRC thread type ensure secure fastening even under vibration, preventing joint failure. Its fully threaded design offers consistent clamping force, solving common issues of load distribution in critical connections. These features make it a top choice for engineers seeking durable, high-performance industrial fasteners that meet rigorous operational demands.

Specification Summary & Compliance

This screw features a 3/8"-16 thread size with a Class 3A thread fit and UNRC coarse thread type, ensuring precise dimensional accuracy. It is manufactured in compliance with ASME B18.3 specifications and ASTM A574 material standards. The product is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to environmental and safety regulations for industrial use.