S-92949A118 4-40 x 1 1/4" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel and passivated finish, ideal for harsh industrial environments.
• High tensile strength of 70,000 psi ensures reliable performance under heavy loads and vibrations.
• Precise Class 3A thread fit provides secure fastening with minimal risk of loosening in critical assemblies.
• Hex drive design (1/16") allows for easy installation and removal with standard tools, reducing assembly time.
• Fully threaded shank offers maximum grip and uniform load distribution along the entire length.
• Rockwell B55 hardness enhances durability and resistance to wear in repetitive use applications.
• Compliance with ASME B18.3, RoHS 3, and REACH ensures safety, quality, and environmental standards are met.

Professional Applications & Engineering Value

These 4-40 UNC coarse thread screws with a rounded head and 18-8 stainless steel construction are engineered to address common industrial challenges, such as corrosion in humid or chemical-exposed settings. The passivated finish significantly extends service life by preventing rust, while the hex drive and fully threaded design simplify installation in tight spaces, reducing labor costs. Ideal for machinery, electronics, and automotive assemblies, they provide consistent Class 3A thread fit for vibration-resistant connections, ensuring long-term reliability in industrial applications where precision and compliance with standards like ASME B18.3 are critical.

Specification Summary & Compliance

This product features precise Class 3A thread fit with UNC coarse threading and adheres to ASME B18.3 manufacturing specifications. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity for global industrial use.