S-92949A326 3-48 x 3/8" 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
• Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for reliable, long-term fastening
• Precision thread engagement with Class 3A fit and UNC coarse threads ensuring secure, vibration-resistant connections
• Efficient installation via 1/16" hex drive, providing positive torque control and reducing tool slippage
• Full threading along the 3/8" length for maximum grip and uniform stress distribution in assemblies
• Compliance with major standards including ASME B18.3, RoHS 3, and REACH for guaranteed quality and environmental safety
• Versatile rounded button head design delivering a low-profile, finished appearance while minimizing snagging risks

Professional Applications & Engineering Value

These 3-48 UNC thread rounded head screws are engineered to address critical challenges in precision assembly and corrosive settings. The 18-8 stainless steel base, enhanced by a passivated finish, provides excellent resistance to oxidation and chemical exposure, extending service life in applications like electronic enclosures, medical devices, and marine equipment. The Class 3A thread fit and coarse thread spacing ensure rapid installation with minimal cross-threading risks, while the fully threaded design offers consistent clamping force across the entire 3/8" length. Combined with a hex drive for high-torque application, these screws deliver reliable performance in automated or manual assembly lines, reducing downtime and maintenance costs.

Specification Summary & Compliance

This product adheres to ASME B18.3 specifications for dimensional accuracy and performance. Threads conform to UNC standards with a Class 3A fit for precise, tight-tolerance assemblies. The screws are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring they are free from hazardous substances. Additional specifications include a right-hand thread direction, 0.188" head diameter, and coarse thread spacing, all manufactured to meet industrial demands for reliability and safety.