S-92949A347 3/8"-24 x 1/2" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
• Exceptional thread precision with Class 3A UNF fine threads ensuring secure, vibration-resistant fastening in critical applications
• High tensile strength of 70,000 psi provides reliable performance under heavy loads and mechanical stress
• Optimized drive engagement with 7/32" hex drive for efficient installation and reduced tool slippage
• Rounded button head design offers a low-profile, aesthetically clean finish while minimizing snagging risks
• Full threading along the 1/2" length enables maximum grip and adjustment flexibility in assembled components
• Compliance with ASME B18.3 and environmental regulations ensures consistent quality and safe use in regulated industries

Professional Applications & Engineering Value

This 18-8 stainless steel rounded head screw delivers critical performance in applications where corrosion resistance, thread reliability, and mechanical strength are non-negotiable. The passivated finish significantly enhances the innate corrosion resistance of stainless steel, making it suitable for outdoor equipment, food processing machinery, and chemical handling systems where exposure to moisture and aggressive agents is common. The 3/8"-24 UNF Class 3A fine thread provides superior clamp load retention and resistance to loosening under vibration, which is essential in automotive assemblies, precision instruments, and heavy machinery. Combined with a Rockwell B55 hardness and 70,000 psi tensile strength, this screw maintains integrity in high-stress points, reducing maintenance frequency and enhancing operational safety.

Specification Summary & Compliance

This product features a 3/8"-24 UNF fine thread with Class 3A fit, ensuring high precision and interchangeability. Manufacturing and dimensional compliance adhere to ASME B18.3. The screw is fully threaded with a length of 1/2", head diameter of 0.656", and drive size of 7/32". It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards, confirming its suitability for use in environmentally regulated and international markets.