S-92949A352 1/2"-13 x 5/8" 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
• High tensile strength of 70,000 psi ensures reliable performance under heavy loads and vibration
• Precise Class 3A thread fit provides secure fastening with minimal risk of cross-threading or loosening
• 5/16" hex drive design allows for high-torque installation and easy removal with standard tools
• Fully threaded shank offers maximum grip length and uniform stress distribution
• Rounded button head profile delivers a low-profile, aesthetically clean finish while reducing snag hazards
• Rockwell B55 hardness maintains thread integrity and resistance to wear over repeated use

Professional Applications & Engineering Value

This 18-8 stainless steel rounded head screw is engineered to address critical challenges in industrial assembly, machinery, and structural applications. The combination of UNC coarse threads and Class 3A fit ensures rapid installation and vibration resistance in high-stress environments, while the passivated finish significantly enhances corrosion protection against chemicals, moisture, and atmospheric exposure. The hex drive and fully threaded design facilitate efficient mounting in tight spaces and provide consistent clamping force across the entire fastener length. Ideal for OEM equipment, automotive components, and marine fixtures, this screw delivers long-term reliability where tensile strength and regulatory compliance are paramount.

Specification Summary & Compliance

This screw meets ASME B18.3 specifications for dimensional accuracy and performance. Threading conforms to UNC coarse standards with Class 3A fit for precision engagement. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring adherence to environmental and safety regulations for industrial use.