S-92949A593 5/16"-18 x 2 1/2" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction and passivated finish for long-lasting performance in harsh environments
• Superior mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for reliable load-bearing capability
• Precise thread engagement with UNC coarse threading and Class 3A fit ensuring secure fastening and vibration resistance
• Optimized drive efficiency through 3/16" hex drive design providing maximum torque transmission and installation control
• Full-threaded construction delivering consistent holding power along the entire 2½" length for superior grip strength
• Industry-standard compliance meeting ASME B18.3 specifications for dimensional accuracy and performance reliability
• Environmental regulation adherence with RoHS 3 and REACH compliance for safe use across global industrial applications

Professional Applications & Engineering Value

This 18-8 stainless steel rounded head screw delivers critical performance advantages for demanding industrial applications. The combination of 70,000 psi tensile strength and Rockwell B55 hardness provides exceptional structural integrity where vibration resistance and load durability are paramount. The passivated finish significantly enhances corrosion protection, making it ideal for manufacturing equipment, machinery assembly, and outdoor installations exposed to moisture or chemicals. The UNC coarse threading with Class 3A fit ensures rapid installation and secure fastening in various materials, while the hex drive design allows for high-torque application without stripping. Engineered to ASME B18.3 standards, this heavy-duty fastener maintains dimensional precision across production runs, reducing assembly time and improving maintenance reliability in industrial settings.

Specification Summary & Compliance

This 5/16"-18 x 2½" rounded head screw features precise UNC coarse threading with Class 3A fit for superior thread engagement and dimensional accuracy. Manufactured according to ASME B18.3 specifications for consistent performance and interchangeability. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial applications while maintaining the corrosion-resistant properties of the 18-8 stainless steel material with passivated surface treatment.