S-90044A238 2 1/2"-8 x 10" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance under extreme loads, reducing the risk of fastener failure in critical applications.
• Superior corrosion resistance from the black-oxide finish on alloy steel prolongs service life in harsh industrial environments, minimizing maintenance needs.
• Precise Class 2A thread fit with UN fine threads provides smooth engagement and vibration resistance, enhancing assembly stability and longevity.
• High hardness rating (Rockwell C37) offers excellent wear resistance, maintaining thread integrity and dimensional accuracy over repeated use.
• Partially threaded design allows for secure clamping in specific zones, improving joint control and reducing stress concentration.
• Compliance with ASTM A574 guarantees consistent quality and mechanical properties, ensuring interoperability with standardized components.
• RoHS 3 and REACH compliance supports environmental and safety regulations, facilitating use in global markets without regulatory concerns.

Professional Applications & Engineering Value

Engineered for demanding industrial settings, this black-oxide alloy steel socket head cap screw addresses common challenges like corrosion, high-stress fatigue, and assembly precision. The UN fine thread (2 1/2"-8) with a Class 2A fit ensures tight tolerances and reduced loosening under vibration, ideal for machinery, heavy equipment, and structural frameworks. Its partially threaded rod design concentrates clamping force effectively, preventing joint slippage in dynamic loads. With a 170,000 psi tensile strength and Rockwell C37 hardness, it withstands intense operational stresses in construction, automotive, and aerospace applications, while the black-oxide surface treatment adds a protective layer against moisture and chemicals, extending service life and reducing downtime.

Specification Summary & Compliance

This socket head cap screw adheres to Class 2A thread fit for precise dimensional accuracy and features a UN fine thread (2 1/2"-8) with a minimum thread length of 6 1/4". It conforms to the ASTM A574 manufacturing standard, ensuring consistent mechanical properties. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting safe and environmentally responsible usage in various industries.