S-98164A222 1/4"-20 x 1 1/2" ASME B18.3, ASTM F879 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance in harsh environments thanks to 316 stainless steel construction and passivated finish
• High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
• Precise, reliable fastening ensured by Class 3A thread fit and UNC coarse threads for vibration resistance
• Easy installation and removal with a 5/32" hex drive and rounded button head design
• Full-length threading provides maximum grip and holding power across the entire 1-1/2" length
• Compliance with major industrial standards including ASME B18.3, RoHS 3, and REACH for guaranteed quality and safety
• Durable, long-lasting finish that maintains integrity under mechanical stress and corrosive conditions

Professional Applications & Engineering Value

Engineered for industrial applications where exposure to chemicals, moisture, and salt is a concern, this 316 stainless steel rounded head screw offers a reliable solution to common corrosion and strength challenges. The passivated finish enhances the natural corrosion resistance of the material, making it ideal for marine, chemical processing, and food industry equipment. Its UNC coarse thread and Class 3A fit provide excellent engagement and vibration resistance, reducing the risk of loosening in dynamic environments. The combination of 70,000 psi tensile strength and a hex drive ensures that these fully threaded screws can be securely tightened and withstand heavy loads, offering peace of mind in critical assemblies.

Specification Summary & Compliance

This screw features a 1/4"-20 UNC coarse thread with a Class 3A fit for high precision and strength. It is manufactured in compliance with ASME B18.3 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring it is free from hazardous substances and suitable for global industrial use.