S-91783A585 5/16"-18 x 1 1/4" ASME B18.6.3 Stainless Steel Round Head Slotted 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 with 100,000 psi tensile strength and Rockwell B100 hardness for reliable load-bearing performance
• Precise thread engagement through Class 2A UNC coarse threading, ensuring secure fastening and vibration resistance
• Full-threaded design provides maximum grip length and uniform stress distribution across the entire fastener
• Standard slotted drive compatibility with rounded head profile for straightforward installation using common tools
• Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards (RoHS 3, REACH)
• Dimensional consistency with standardized 5/16"-18 thread size and 1-1/4" length for reliable interchangeability

Professional Applications & Engineering Value

This 18-8 stainless steel rounded head slotted screw delivers critical performance advantages in demanding industrial settings where corrosion resistance and mechanical reliability are paramount. The combination of 100,000 psi tensile strength and fully threaded UNC coarse thread design ensures maximum clamping force and vibration resistance in machinery assembly, structural frameworks, and heavy equipment applications. The passivated finish significantly enhances the natural corrosion resistance of stainless steel, making these industrial fasteners suitable for outdoor installations, marine environments, and chemical processing facilities where moisture and corrosive agents are present. The standardized ASME B18.6.3 compliance guarantees dimensional accuracy and interchangeability, reducing installation time and maintenance costs across manufacturing, construction, and MRO operations.

Specification Summary & Compliance

This fastener features precision Class 2A thread fit with UNC coarse threading (5/16"-18) and standardized dimensions including 1-1/4" length. Manufactured to ASME B18.6.3 specifications with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The right-hand thread direction and fully threaded design ensure consistent performance across industrial applications.