Stainless Steel Cable Tray Bolt Dimensions

Stainless steel cable tray bolts are typically AISI 316 grade, available in square neck carriage bolt style, with common sizes like 3/8" x 3/4", and are used with splice plates and nuts for secure cable tray connections.

Bolt Material and Grade

Stainless steel cable tray bolts are generally made from AISI Type 316 stainless steel, which provides excellent corrosion resistance, especially in harsh or outdoor environments. This grade is preferred for ladder and ventilated cable trays, ensuring durability and long-term performance in industrial and marine applications .

Bolt Types and Styles

The most common bolt style used in cable tray systems is the square neck carriage bolt, which prevents rotation when tightening nuts. These bolts are used in conjunction with splice plates, nuts, and washers to connect tray sections securely . Other bolt types may include hex bolts or machine screws depending on the manufacturer and tray design.

Standard Sizes and Dimensions

Typical stainless steel cable tray bolts include:

• Diameter: 3/8 inch (9.5 mm)
• Length: 3/4 inch (19 mm) for standard splice connections
• Quantity per splice plate: Usually 8 bolts per plate for fixed splice connections
• Rung spacing compatibility: Bolts are designed to accommodate ladder tray rungs spaced 6", 9", or 12" apart Bolt dimensions may vary slightly depending on the tray width and manufacturer specifications, but the above sizes are standard for most Eaton B-Line and similar stainless steel cable tray systems.

Installation and Usage

• Bolts are used to secure splice plates between adjacent tray sections, ensuring mechanical stability and electrical continuity.
• Washers and nuts are typically included to distribute load and prevent loosening.
• The resistance of fixed splice connections is designed to be very low (e.g., ≤0.00033 ohm) to maintain electrical grounding continuity .
• Stainless steel bolts are suitable for indoor and outdoor installations, including corrosive environments, due to their high chromium and molybdenum content .

Summary

For stainless steel cable tray systems, AISI 316 square neck carriage bolts with standard sizes like 3/8" x 3/4" are widely used. They are paired with splice plates, nuts, and washers to ensure secure, corrosion-resistant connections, compliant with NEMA VE 2 and other relevant standards . Proper selection of bolt size and material is essential for structural integrity and long-term performance of cable tray installations.