S-94288A216 5/16"-18 x 1 1/4" Extreme-Strength Stainless Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and outdoor applications
• Superior mechanical strength with 170,000 psi tensile strength and Rockwell C38 hardness for heavy-duty load-bearing applications
• Reliable fastening performance with Class 2A thread fit ensuring consistent engagement and vibration resistance
• Enhanced stability and load distribution from the integrated flange design, eliminating the need for separate washers
• Easy installation and removal with standard external hex drive compatible with common wrench tools
• Full thread coverage along the 1-1/4" length provides maximum grip and adjustment flexibility
• Wide industrial compatibility with UNC coarse threading meeting standard inch-system requirements

Professional Applications & Engineering Value

This 5/16"-18 UNC hex head screw delivers critical engineering solutions where corrosion resistance and structural integrity are paramount. The 18-8 stainless steel composition prevents rust and chemical degradation in marine, food processing, and chemical plant environments. Its fully threaded design and Class 2A thread fit maintain precise alignment in vibrating machinery, while the flanged head distributes clamping force evenly, preventing surface damage. With 170,000 psi tensile strength, it reliably secures heavy equipment, structural frames, and industrial assemblies where failure is not an option. The external hex drive ensures quick installation with standard tools, reducing assembly time in manufacturing and maintenance operations.

Specification Summary & Compliance

Manufactured to exact inch system standards with 5/16"-18 UNC coarse threads and Class 2A thread fit tolerances for consistent performance. The screw features a 1-1/4" length, 5/8" flange diameter, and external hex drive with 3/8" head width. Complies with industry-standard mechanical properties and material specifications for industrial fasteners, suitable for applications requiring reliable thread engagement and corrosion-resistant performance in demanding operational conditions.