S-90044A222 2"-8 x 8" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi for reliable performance in high-stress industrial applications.
• Superior corrosion resistance with black-oxide coating, extending service life in harsh environments.
• Precise Class 2A thread fit ensures smooth assembly and secure fastening with minimal play.
• Fine thread design provides increased clamping force and vibration resistance in critical joints.
• Partially threaded shank allows for optimal grip and alignment in varied material thicknesses.
• High hardness (Rockwell C37) reduces wear and deformation under heavy loads.
• Standard hex socket drive enables easy installation with common tools in confined spaces.

Professional Applications & Engineering Value

This black-oxide alloy steel socket head cap screw is engineered to address common industrial challenges such as joint failure under dynamic loads and corrosion in demanding environments. The 2"-8 UN fine thread configuration enhances load distribution, making it ideal for heavy machinery, structural assemblies, and precision equipment where vibration resistance is critical. With a minimum thread length of 5 inches and robust ASTM A574 compliance, it ensures consistent performance in automotive, construction, and manufacturing sectors. The partially threaded design simplifies alignment in thick materials, reducing installation time and improving reliability in high-torque applications.

Specification Summary & Compliance

This fastener features a Class 2A thread fit per UN standards, ensuring precise dimensional accuracy and interchangeability. Manufactured in accordance with ASTM A574 specifications, it meets stringent quality requirements for socket head cap screws. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible sourcing and usage in global industrial markets.