S-92240A886 7/8"-9 x 4" ASME B18.2.1 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance thanks to 18-8 Stainless Steel construction, ideal for harsh industrial environments.
• High tensile strength of 80,000 psi ensures reliable performance in heavy-duty and high-stress applications.
• Rockwell B70 hardness provides excellent durability and resistance to wear and deformation.
• Coarse UNC thread with Class 2A fit offers faster assembly, easier alignment, and robust holding power.
• Full 4" threading maximizes grip length and load distribution across the entire fastener.
• External hex drive and standard hex head allow for high-torque installation with common tools, simplifying maintenance.
• Compliance with ASME B18.2.1, RoHS 3, and REACH guarantees quality, safety, and environmental responsibility.

Professional Applications & Engineering Value

This 7/8"-9 UNC hex head screw is engineered for demanding applications where failure is not an option. The 18-8 Stainless Steel material provides superior resistance to rust and corrosion, making it perfect for outdoor infrastructure, chemical processing equipment, and marine applications. The coarse thread design is less prone to cross-threading and is ideal for faster assembly in softer materials or where vibration resistance is critical. With a fully threaded 4-inch length and Class 2A thread fit, it ensures maximum engagement and uniform stress distribution, solving common issues of joint loosening and material fatigue in heavy machinery, structural steel frames, and large-scale industrial assemblies. Its compliance with major standards means it integrates seamlessly into regulated projects, providing peace of mind for engineers and procurement specialists.

Specification Summary & Compliance

This screw features a 7/8"-9 UNC thread with a Class 2A tolerance for consistent fit and performance. It is manufactured in accordance with the ASME B18.2.1 standard, ensuring dimensional accuracy and interchangeability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and safe for use in various industrial and international markets.