S-92949A576 5/16"-18 x 3/8" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 18-8 stainless steel construction and passivated finish, ideal for harsh environments.
• High tensile strength of 70,000 psi ensures reliable, secure fastening under significant load and stress.
• Precise Class 3A thread fit provides excellent engagement and vibration resistance in demanding applications.
• Hex drive design (3/16") allows for high-torque installation and easy removal with standard tools.
• Coarse UNC thread enables quick assembly and reduces the risk of cross-threading.
• Fully threaded shank offers consistent holding power along the entire 3/8" length.
• Compliance with ASME B18.3, RoHS 3, and REACH guarantees quality, safety, and environmental standards are met.

Professional Applications & Engineering Value

This 18-8 stainless steel rounded head screw is engineered to solve common industrial fastening challenges, such as corrosion-induced failure and assembly inefficiency. The passivated finish significantly enhances its resistance to oxidation and chemical exposure, making it a top choice for marine, chemical processing, and outdoor equipment applications. Its 5/16"-18 UNC coarse thread and Class 3A fit ensure rapid, secure installation with minimal risk of stripping, while the hex drive accommodates high torque for robust connections. With a tensile strength of 70,000 psi and Rockwell B55 hardness, it delivers long-term reliability in structural and machinery assemblies, reducing maintenance needs and downtime.

Specification Summary & Compliance

This screw adheres to strict dimensional and performance criteria, including a Class 3A thread fit per UNC standards for precision. It is manufactured in compliance with ASME B18.3 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring it is free from hazardous substances and suitable for global industrial use.