S-92198A564 1/4"-20 x 5 1/2" ASME B18.2.1 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments and long-term reliability.
• High tensile strength of 80,000 PSI ensures dependable load-bearing capacity and secure fastening under stress.
• Rockwell B70 hardness provides excellent durability and resistance to wear, reducing replacement frequency.
• External hex head design allows for easy installation and removal with standard tools, improving assembly efficiency.
• Partial threading offers optimal grip and clamping force, minimizing the risk of thread stripping in varied materials.
• Class 2A thread fit ensures smooth assembly and interchangeability, reducing production delays and rework.
• Compliance with ASME B18.2.1, RoHS 3, and REACH guarantees adherence to industry standards and environmental safety for global supply chains.

Professional Applications & Engineering Value

This 1/4"-20 UNC coarse thread hex head screw is engineered to address critical challenges in industrial fastening, such as vibration resistance and material compatibility. The 18-8 stainless steel composition delivers exceptional corrosion resistance, making it suitable for applications in marine, chemical processing, and outdoor equipment where moisture and chemicals are prevalent. The partial threading design enhances grip strength in assemblies requiring precise clamping, while the external hex drive facilitates quick installation with common wrenches, reducing labor time. By meeting ASME B18.2.1 specifications, it ensures reliability in structural and machinery applications, providing a robust solution for engineers seeking durability and compliance in demanding environments.

Specification Summary & Compliance

This screw features a 1/4"-20 UNC coarse thread with Class 2A thread fit for consistent dimensional accuracy and ease of assembly. It adheres to ASME B18.2.1 manufacturing standards, ensuring precise head dimensions (7/16" width, 5/32" height) and thread geometry. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations confirms its environmental safety, free from hazardous substances, making it suitable for global industrial and commercial use.