Raybestos 681939 Disc Brake Rotor - Rear

Overview of Raybestos 681939 Disc Brake Rotor

The Raybestos Specialty - Truck; Coated Rotor 681939 is engineered for reliable braking performance on Ford Transit trucks. Designed specifically for Transit-150, Transit-250, Transit-350, and Transit-350 HD models, this solid disc brake rotor meets precise specifications to ensure proper fit and function.

• Part Number: 681939
• Brand Line: Specialty - Truck; Coated Rotor
• Type: Solid Disc Brake Rotor with Smooth Surface
• Mounting Bolt Hole Quantity: 5
• Outside Diameter: 12.126 inches (308.000 mm)
• Nominal Thickness: 0.710 inches (18.050 mm)
• Discard Thickness: 0.590 inches (15.000 mm)
• Center Hole Diameter: 4.803 inches (122.000 mm)
• Mounting Bolt Hole Circle Diameter: 5.906 inches (150.000 mm)
• Bolt Thread Pitch: 1.250 mm (0.049 inches)

Detailed Product Description

This Raybestos disc brake rotor 681939 is a solid, conventional rotor designed for heavy-duty truck applications. The smooth surface finish supports consistent brake pad contact, reducing uneven wear and noise. With a nominal thickness of 0.710 inches and a discard thickness of 0.590 inches, this rotor provides a clear service life indicator to maintain safe braking performance. The rotor’s 5-bolt mounting pattern and 12.126-inch outside diameter are tailored to fit Ford Transit-150, Transit-250, Transit-350, and Transit-350 HD models, ensuring compatibility and ease of installation.

The Specialty - Truck; Coated Rotor product line focuses on providing coated rotors that resist corrosion and extend rotor life in demanding truck environments. This coating helps protect the rotor surface from rust and environmental damage, which is especially beneficial for commercial vehicles like the Ford Transit series that operate in varied conditions.

Common Applications and Problem Solving

• Replacement for worn or warped rotors on Ford Transit-150, Transit-250, Transit-350, and Transit-350 HD
• Addresses brake pulsation caused by uneven rotor thickness
• Resolves noise issues related to rotor surface imperfections
• Prevents premature rotor corrosion with coated surface
• Maintains proper brake pad contact for consistent stopping power

Installation Notes and Tips

• Verify rotor thickness before installation; replace if below discard thickness of 0.590 inches
• Ensure mounting surfaces and bolt holes are clean and free of debris
• Use proper torque specifications for the 5 mounting bolts with 1.250 mm thread pitch
• Inspect brake pads for wear and replace if necessary to avoid uneven rotor wear
• Check hub and rotor fitment to confirm center hole diameter of 4.803 inches

Quality Assurance and Warranty

Raybestos rotors are manufactured to meet or exceed OEM specifications for fit, form, and function. The Specialty - Truck; Coated Rotor line undergoes rigorous quality control to ensure durability and performance under heavy-duty conditions. While specific warranty details may vary, Raybestos typically offers coverage against defects in materials and workmanship. Always consult product documentation or authorized sources for exact warranty terms.