S-94444A109 5/16"-18 x 3/4" ASME B18.2.1 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide coated 18-8 Stainless Steel, ideal for harsh environments and extended service life
• High tensile strength of 80,000 psi ensures reliable load-bearing capacity and structural integrity in demanding applications
• Rockwell B70 hardness provides excellent durability and resistance to wear and deformation
• Coarse UNC threading with Class 2A fit offers quick assembly, easy engagement, and reliable fastening performance
• External hex drive design allows for high-torque installation using standard tools, reducing installation time
• Full threading along the 3/4" length enables versatile positioning and secure fastening across various material thicknesses
• Compliance with ASME B18.2.1, RoHS 3, and REACH ensures quality, safety, and environmental standards are met for industrial use

Professional Applications & Engineering Value

This 5/16"-18 x 3/4" hex head screw is engineered to address critical industrial challenges, such as vibration loosening and environmental degradation. Constructed from Black-Oxide 18-8 Stainless Steel, it provides exceptional corrosion resistance, making it suitable for outdoor equipment, marine applications, and chemical processing plants where moisture and corrosive agents are present. The UNC coarse thread design ensures rapid installation and robust holding power in soft materials or where frequent disassembly is required. With an external hex drive and 80,000 psi tensile strength, it delivers reliable performance in heavy machinery, construction frameworks, and automotive assemblies, reducing maintenance needs and downtime. This screw is a dependable choice for engineers seeking durability, compliance, and efficiency in industrial fastening solutions.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including Class 2A thread fit for consistent engagement and UNC coarse threading with a 5/16"-18 size. It is manufactured in accordance with ASME B18.2.1 specifications, ensuring uniformity and reliability. 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 various industrial and international markets.